Investigation into the relationship between the density of fresh water shrimps in fleet brook and the flow rate of water brook Essay Example

Investigation into the relationship between the density of fresh water shrimps in fleet brook and the flow rate of water brook Essay Fresh water shrimps (gammarus pulex) are crustacean living in many rivers and streams of this country. They prefer to live in flowing fresh water environments which often has better oxygenated waters that still water environments.2 Aim The aim of my investigation will be to determine the relationship, if any, between the gammarus pulex (fresh water shrimp) population density (the number of shrimps) and the rate of water flow at particular sites of Shir Burn Brook. Preliminary work We will write a custom essay sample on Investigation into the relationship between the density of fresh water shrimps in fleet brook and the flow rate of water brook specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Investigation into the relationship between the density of fresh water shrimps in fleet brook and the flow rate of water brook specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Investigation into the relationship between the density of fresh water shrimps in fleet brook and the flow rate of water brook specifically for you FOR ONLY $16.38 $13.9/page Hire Writer For my preliminary work, a variety of sampling techniques were carried out to collect samples of freshwater organisms in Shir Burn Brook. The methods include the kick sampling technique and the prodding sampling technique. The range of the flow rate of water in Shir Burn Brook was found to be 0.05m/s-0.25m/s. The samples collected also enabled me to correctly classify and thus allowing me to recognize gammarus pulex. Samples were also collected in a static water environment to enable me to differentiate between the species gammarus pulex and its static water relatives, grangonyx pseudogracilis. Kick samples were taken at different site in the brook. The numbers of freshwater shrimps found at each of these sites are 20, 35, 60, 15, 24. This shows me the range of the number gammarus pulex I should expect. These figures gave me a rough guide on the range of the numbers of gammarus pulex living in the brook. This means that I have a rough estimate of the numbers of shrimps I expect to find during my investigation. Hypothesis: There will be higher densities of gammarus pulex present in areas of faster water flow. The results should show a positive relationship between the rate of flow at a site in the stream and the number of shrimps found at the site. I believe this will be due to the variation in oxygenation of the water. As the water flows faster, the movement will mean that more oxygen can be dissolved into the water, creating a higher dissolved oxygen level in the water. The increased amount of oxygen will allow larger numbers of shrimps to thrive. Null hypothesis 1. There will be no relationship between the population density of gammarus pulex and the water flow rates of sites in Shir Burn Brook where the gammarus pulex are collected. 2. There is no correlation between the dissolved oxygen level of the water of the different sites of Shir Burn Brook and the rate of flow of water at these sites. Background information to explain hypothesis Site The Fleet is a man-made brook by diversion of Shir Burn Brook (TM075314) in the 19th century. The purpose of the Fleet was to deliver water to be used by the steam turbines in the near by railway station down stream.1 It runs through a clearing in woodlands. It is relatively unpolluted with nitrates and phosphate levels within the normal guidelines. As with any flowing fresh water habitat, there are large numbers of freshwater shrimp dwelling there.1 Gammarus pulex Gammarus pulex is a species of freshwater shrimps. Fresh water shrimps belong to the order of the amphipoda. A typical amphipod crustacean is flattened from side to side, and the body when at rest is curved round to form an arch. Gammarus pulex is found swimming on its side. When it is moving the hind parts of its body straightens out, only to contract again suddenly into its normal curved position as soon as the creature stops. They are often found under stones or on the soft surface of the mud, and when disturbed scud rapidly away to shelter. The male is about 25mm in length and the females slightly smaller. Their colour is usually lightish brown. Fresh water shrimps are largely scavengers, feeding on decaying organic matter, but they are also known to devour other smaller creatures. Gammarus pulex are found abundantly in freshwater habitats in the British Isles. Care should be taken during classification to differentiate between the species gammarus pulex and grangonyx pseudogracilis which are usually found in static water environments.2 Flow rate of water Velocity of water varies throughout streams. This is due to the friction between the water and the stream bed. It is therefore expected that deeper parts of the stream will have higher rates of water flow since the surface in contact with stream bed-water volume area is smaller, meaning less friction. Depth is therefore a good indication of the flow rate at any site in the stream. Slower flow rates of water will allow small sediments of mud to develop on the bed of the stream. In faster sites, however only larger substrates such as pebbles are allowed to deposit while substrates that are too small are carried off by the water. The stony bed of the stream are especially suited for the gammarus pulex as there legs will allow them to cling on to rocks, this would be less possible with a muddy substrate.3 Some species of fresh water fauna are in a similar niche to the gammarus pulex will not all be designed to with stand the turbulence of the water. Therefore, at sites with higher water speeds, the diversity of species present there will be less. This means that there will be less interspecies competition for all the essentials which the gammarus requires (e.g. planktonic foodstuffs, oxygen, space for shelter).4 Dissolved oxygen and temperature. The solubility of oxygen from air, at normal atmospheric pressure, in pure fresh water is related to the temperature of the water by the equation: Cs = 475à ¯Ã‚ ¿Ã‚ ½(33.5 + t ) 5 Where Cs is the solubility of O2 in water in mg/l and t is the temperature. It is obvious that if more oxygen is dissolved in the water, there will be more of it available for the respiration of fresh water fauna living in the stream. Respiration provides energy in the form of ATP allowing the metabolisms in the animals bodies to occur.6 The oxygen concentration in the streams is expected to be higher in concentration compared to static aquatic environment. The distribution of oxygen is also expected to be more even than static water habitats. This is all due to the movement of the water in streams allowing more oxygen to dissolve and subsequently mixing the oxygen evenly. Nitrates and phosphates Nitrogen and phosphorus are basic elements in all living matter. Nitrates and phosphates therefore are not unexpected to be found dissolved in Nitrate is an essential provider of nitrogenous elements for living organisms. Nitrogen is essential for the synthesis of protein and nucleotides in most living things. Nitrogen is recycled through the biosphere by the nitrogen cycle.7 Dead and decaying organic materials (in this case dead leaves) are broken down by denitrifying bacteria inhabiting the water. The nitrogenous molecules are converted into nitrates Nitrate and phosphates are regulators of organic growth. The free flowing algae and small planktonic forms are affected directly. High levels of nitrates and phosphates often stimulate their growth. Gammarus feed on these. Therefore if more plankton are in the stream due to the nitrate and phosphates, the number of gammarus will increase also. The problem with nitrate and phosphates is that when excessive amounts are present (often due to soil leaching, effluent produced by farms, and human effluent) algal growth is intensified leading to eventual deoxygenation of the water eventually causing eutrophication. Thus there will be a decrease in the number of gammarus found in the water. 8 Variables and Key variables Explain Independent, the different rates of flow of the Dependent Factor / Variable Effect on the project Control method Density of fresh water shrimps This is what is tested Flow rate of river This is the key variable of the investigation. It is expected that a higher flow rate of water will lead to higher gammarus population densities, and lower water flow rate will lead to smaller gammarus populations. Dissolve oxygen level of water For all aerobic organisms, oxygen is essential for their survival. Thus, a higher concentration of dissolved will enable a larger population of gammarus to exist in an area providing other factors are not limiting. Control variables Nitrate levels in water This will increase the algal populations in the water. Though sustainable amount of nitrates in the stream will lead to more foodstuffs for the gammarus and thus increase their population, high levels of nitrates caused primarily by pollution will lead to diminished shrimp population as the result to the effects of eutrophication. This variable is sampled at each site so that it is ensured that the nitrate level throughout the stream is constant. It is expected to be constant since the movement of the water will mix any dissolved nitrates till it is in equilibrium in the water. Phosphate levels in water Like the nitrate levels, this abiotic factor will cause fluctuating levels of micro organisms in the stream. The phosphate level in the water is tested at every site. This again ensures that the phosphate concentration is constant throughout all of the tested sites as expected. The phosphate compound is expected to be distributed evenly in the water due to the movement of the currents. Water temperature There will be an optimal temperature range at which gammarus will like to live. If a section of the river is out of this range, the number of gammarus found there will be lower than other sites. The water temperature is monitored at every site. This again ensures that the temperature of the water is constant throughout every site. The water of the brook should be of very similar temperatures since the flowing water currents will distribute the heat evenly throughout the river. Where the water temperature is significantly different from the other sites tested, another site with a more acceptable water temperature will be chosen to be sampled. pH of water There again will be a range of pH of water outside of which few gammarus will survive. Sites whose water pH is too low or high will not contain many gammarus. The pH of the water is tested at every site. This is to make sure that every site tested all have the same pH. Sites whose pH is significantly different from all of the other sites are not chosen to take samples from. The pH is expected to remain fairly consistent throughout the stream. Leaf coverage of the sky above the brook If a section of the brook is covered by leaves, the chance of a dead leave falling into the brook is greatly increased. Since gammarus pulex feeds primarily on decaying plant material, the populations of freshwater shrimp in these regions will be expected to be greater than regions with no leaf cover. The percentage leaf coverage is recorded at the sites where samples are taken. It is made sure that the leaf coverages at all these sites are similar. This shall not prove to be difficult since the brook runs through a wooded area. Seasonal variations Due to the life cycle of the fresh water shrimps, there will be times in the year were there will be small amounts of the gammarus making sampling difficult. This is over come by taking all of the samples in a day. The investigation is conducted in summer when there is sufficient numbers of shrimps in the river. Range of samples and number of repeats At least ten different sites of the stream should be sampled. This will give me a suitable amount of data to adequately perform statistical tests such as Spearmans rank coefficient. The range of the water flow rate of the sites will be from about 0.05m/s 0.25m/s as I have discovered in my preliminary work. This will provide an adequate range for the above ten sites of data to be taken, e.g.: 0.05m/s 0.07m/s 0.09m/s 0.11m/s 0.13m/s 0.15m/s 0.17m/s 0.19m/s 0.21m/s 0.23m/s In practice it will be difficult in the natural environment of to select sites with these exact flow speeds of water. Rather than findinf sites with precisely the same flow rate of the above, ten sites with suitably different flow rates and of suitable range is used to take the samples from. At each site, the site is repeatedly sampled for ten times. This will allow me to calculate the mean of each site and to identify any anomalous samples that were taken. Apparatus A wide range of equipments are needed for sample collection and the monitoring of the aboitic variables of the different sites of the stream. The possible sampling techniques are also considered here as the preference of any one of the methods will invariably affect the choices of apparatus. Kick sampling Prod sampling Needs large area to take each sample, So the sample area may not e of equal flow rate Not much substrate at some sites. Prodding method difficult in picking up samples. Use of apparatus Apparatus available Apparatus Chosen Reason for choice Effect on precision and reliability To measure flow rate of rive at different sites Pooh stick method Impellor method Impellor method The impellor will enable me to determine the rate of water flow at the bed of the stream. Whereas the Pooh stick method will only tell me the surface flow rate. The impellor and flow rate counter will give the speed of water flow to the nearest 0.1m/s. it also eliminates any human error To measure water temperatures Mercury thermometer Digital thermometer Digital thermometer It is more accurate if the thermometer is always left in the water when the temperature reading is taken. The level of the stream is on a very low level, making the accurate reading of the mercury thermometer very difficult. Furthermore, the digital thermometer will record the temperature to the nearest 0.1oC, whereas the accuracy of the spirit thermometer is at best à ¯Ã‚ ¿Ã‚ ½0.25oC. The digital will give us the temperature of the water to a greater degree of accuracy (à ¯Ã‚ ¿Ã‚ ½0.05oC). This reduces the precision error from the mercury thermometer by ten fold. Human error is eliminated by not having to take a reading of the temperature at the correct eye level. There is no longer need to estimate when the reading lies between two graduation marks. To measure water pH level Digital pH meter Universal indicator Digital pH meter The digital pH meter will give an accurate qualitative pH reading to two decimal places. The universal indictor will allow me to estimate the pH by matching the colour of the test solution with a colour chart. This is extremely prone to errors in that it is often very difficult to obtain test solutions with exact matching colours as the chart. The digital meter gives the pH to a far greater degree of accuracy. There is no comparison with colour charts needed. Care should be taken to ensure that the pH meter is properly calibrated before use. To measure dissolved oxygen concentrations of water. Diaphragm dissolved oxygen meter Diaphragm dissolved oxygen meter (0.0-19.9mg/l) This will give the dissolved oxygen level of the water. There is not another method that is both as accurate and as easily performed as this, making it ideal for project work in the wild. This is the only applicable method of testing the oxygen content of the water in the stream. It is also the most accurate method that could be used. The dissolved oxygen concentration of the water will have to be tested on site rather than on samples taken back to the laboratory. This is because that some oxygen will enter or leave the water in the sample bottles during transporting to the laboratory. To obtain dissolved nitrate concentrations of water. Reflectometer Indicator strips Reflectometer The reflectometer gives the nitrate concentration quantitatively rather than a qualitative result from the indicator strips. It gives the concentration of nitrate in water in units of mg/l. Reflectometry allows the conversion of a single nitrate presence test in to a qualitative nitrate concentration analysis. As the name suggests, the test is conducted by reflection light on an indicator strip which will undergoes a colour change in the presence of nitrate. The strip changes colour in proportion to the concentration of nitrate in the water. The reflectometer is calibrated to detect the degree of this change and convert it into a quantitative concentration of nitrates. To obtain dissolved phosphate concentrations of water. Reflectometer Indicator strips Reflectometer (for high phosphate levels) Indicator strip and reagents kit (for low phosphate levels: 3.0mg/l Similar to the nitrate concentration test, the reflectometer gives the concentration of phosphate in the water quantitatively. One difference between testing for phosphate and nitrate is that there is going to be much less phosphate expected to be dissolved in the water than nitrate. If the nitrate concentration is smaller than 3.0mg/l, this reflectormeter will register the concentration only as low. Under these circumstances, another technique is used. In this technique, 5cm3 of water sample is used and a series of two reagents are added to it. The colour change underwent is compared to the colour changes on a chart. This gives the phosphate concentration to à ¯Ã‚ ¿Ã‚ ½0.25mg/l accuracy. The reasons are similar to those for testing the nitrate concentrations of water. The phosphate low concentration test will present a range of five distinctive colour changes. These will correspond to the concentrations of 0.0mg/l, 0.5mg/l, 1.0mg/l, 1.5mg/l, 2.0mg/l, and 2.5mg/l. This give the phosphate level to a greater degree of accuracy the reflectometers for higher concentrations of phosphates, although the over all precision error will remain similar (0.5à ¯Ã‚ ¿Ã‚ ½2.5 = 1.0 à ¯Ã‚ ¿Ã‚ ½ 5.0) To measure the depth of brook at different sites. Meter rule Meter rule The meter rule will be most suitable as only a rough guide for the depth of the brook is to be obtained. The waster will leave a mark on the ruler from which the depth can be taken. The meter rule will give the depth of the brook to à ¯Ã‚ ¿Ã‚ ½1mm. This is of an acceptable accuracy as only a rough guide of the depth of the stream at the sampling site is requires. To collect sample kicked up. 0.50 meter net width. 0.25 meter net width. 0.5mm holes. 1mm holes. 0.50m wide net with 1mm holes in the netting material with 2m handle. As kick sampling is preferred, as net of the biggest width should be used to ensure that all organisms disturbed by the kick sampling is collected. As gammarus pulex are larger than 1mm, the pores in the net will allow substrate to filter through while retaining the gammarus to be sampled. The biggest possible net is used to ensure that most of the sample kicked up from the stream bed is collected. A net with 1mm pores is used to allow mud particles to pass through the net. Less mud will be transferred to the vessel in which the gammarus pulex are counted. This means the water in the vessel will be clearer which means any gammarus pulex present can be spotted more easily. To mark out site of sample taking. 0.50m by 0.50m quadrants 1.00m by 1.00m quadrants. 0.50 x 0.50m quadrant. A suitably large area of the stream will be marked out by this quadrant for sampling. At the same time the quadrant is not so big so that the speed of water flow does not vary within the area enclosed by the quadrant. A good sized quadrant will allow a site to be marked out for sampling. The quadrant chosen will increase the reliability of the test by allowing a large enough area with the same flow rate to be sampled. Apparatus required to classify and count the numbers of gammarus pulex in each sample. White enamel tray Pipette Plastic spoon. White enamel tray Pipette Plastic spoon. A white enamel tray will offer a light background to contrast the darker colours of the gammarus pulex so that they can be easily spotted. Pipette and plastic spoons will allow gammarus to be removed from enamel tray once they are counted. This avoids one gammarus being counted more than one time. Several major measures are to be take ensure the accuracy of the investigation. Water tamparature, oxygen concentrations, and water samples are collected before any sample is taken. This ensures that the abiotic variables of the water is not disturbed before they are measure. Whilst sampling, always work from down stream to up stream. This means that sites up stream from where the sample is taken is not disturbed. For each sample, the same number of kicks is done with the same hardness. From my preliminary work, kicking each spot ten times gives an adequate numbers of shrimps in each sample. It was seen that if the shrimp population density at a site is high, kicking 10 times brings up large number of gammarus pulex. At areas with low gammarus concentration however, only small numbers of gammarus are collected despite kicking ten times. Method 1. Select 10 sites in the river with 5 suitably ranged flow rates. This can be estimated by firstly measuring the depth of the brook at that point with a meter ruler. Make sure there are no drastic differences in percentage branch cover by using a section of hose pipe. 2. Once a site is chosen, the dissolved oxygen level and the water temperature must be measured first. This means that the water is no disturbed before the measuring which could lead to anomalous results. Water dissolved O2 levels Submerge probe in water. Do not sub merge the electrical wires. Move probe gently in water and wait for dissolve O2 level reading to equilibrate on digital display. Record the dissolve oxygen level in mg/l. Temperature Submerge metal part of thermometer into the water. Water for readings to equilibrate Record the water temperature. 3. Water sample is taken with a 150ml water sample bottle. The water sample should be taken from as close to the bottom of the stream as possible as this is the immediate surrounding of the freshwater shrimps. 3. The flow rate of the water is then tested with an impellor. The impellor device is placed in to the water. When in rotates freely, the digital counter is switched on. A flow rate speed is then given after 30 seconds of testing. Wait another 30 seconds to ensure that the reading displayed is correct since the first reading could be erroneous. 4. Before taking the sample, fill a white porcelain tray with water from the brook. This will allow any fauna collected to survive while the sample is being counted. 5. A 50cm x 50cm quadrat is then placed into the brook. Collect the sample by using the kick sampling technique on areas within the quadrat. The substrate is kicked ten times with the same hardness. The disturbed substrate and organisms is then collected by the net placed down stream. 6. The sample in the net is emptied in to a porcelain tray. It is rinsed with water in the porcelain tray to ensure no life forms are stuck on to the net. 7. Any gammarus pulex identified in the sample is counted. To avoid counting the same shrimp twice, the counted shrimps are removed by a plastic spoon or pipette in to a plastic palette. Once counting is completed the shrimps are returned back in to the brook. 8. All of the remaining substrate and fauna in the porcelain tray are returned in to the river also. 9. Within the vicinity of the quadrant, choose another undisturbed site around 15cm up stream and repeat the process above. A site upstream is used to ensure that the site used is not disturbed when the previous sample is taken. 10. Ten samples should be taken altogether from a site with a certain flow rate. 11. The above is to be repeated with the other nine sites. Testing of water samples The pH, nitrate, and phosphate levels are tested in the laboratory due to the nature of the equipment which has to be used. Nitrate 1. Set test 261 on reflectonmeter. 2. Dip NO3- indicator strip in water sample. 3. Start 60 second count down. 4. The indicator strip should change to a purple colour if nitrates are present. 5. Insert the strip in to the reflectonmeter after 55 seconds. 6. Record the nitrated concentration displayed (mg/l) Phosphate 1. Put 5ml of water sample in to a small bottle. 2. Add in with it 10 drops of H2SO4 (care corrosive). Shake to mix. 3. Select test 124 on reflectonmeter. 4. Start 90 sec countdown. 5. Dip indicator strip in sample. 6. There will not be any colour change if low amounts of phosphate are present. 7. If phosphate levels are below 3mg/l, the reflectonmeter will display LOW. If this happens, use the low phosphate test as below. Low Phosphate 1. Put 5ml of water sample in to a small bottle. 2. Add in with it 5 drops of H2SO4 (care corrosive). 3. Add 1 measure of Reagent 2 then shake for 2min to mix. 4. There should be a colour change of the solution. Compare the colour change with the chart provided to ascertain phosphate level. pH Insert digital pH meter into water sample. Swirl around and wait till reading equilibrates. Record the pH. Safety precautions Make sure that there is someone around at all times, and do not work alone. Do not sample areas in the brook which is too deep. Wear rubber gloves while sampling to avoid infections. Carry a mobile phone in case of an emergency. Give mobile contact numbers to staff. Sign in and out of the field centre so that the staffs know my whereabouts. Analysis of results I will calculate the standard deviation for the data collected from each site of the stream. This will tell me the diversity of the data collected at these sites. I will plot the graph of shrimp density against water current flow. This will inform me of any correlation that may be present between the two variables. I will carry out Spearmans correlation to establish the strength of the correlation between the variables above. I will plot the graph of rate of water flow against dissolve oxygen concentration. This will inform me of any correlation that may be present between the two variables. I will carry out Spearmans correlation to establish the strength of the correlation between the variables above. If there seem to be a linear proportionality between any of the two pairs of variables above, I will calculate the regression line which will enable me to plot a line of best fit onto my graph. This will allow me to carry out interpolations of the data which could give me a chance to carry out further studies in the future to see whether the interpolations are reliable, thus determining the accuracy of this study. By looking at the data for the dissolved oxygen concentration at the different sites and the rate of water flow at each site, it is obvious that there is no correlation between the two variables as I had expected. I will still plot a graph between the two variables and carry out spearmans rank correlation coefficient to support the null hypothesis. Below are examples of how I carried out the statistical analysis. Spearmans rank coefficient Flow rate of water /m/s Density of gammarus pulex R1 R2 d d2 7 8 13 22 14 16 12 7 19 13 ? Conclusion * There is a positive correlation between the current flow rate and the density of gammarus pulex found at the site. * The abiotic factors tested remains constant throughout the river, it is therefore assumed that the varying densities of gammarus pulex collected at different sites are not affected by these. The constant nature of abiotic factors is caused by the moving nature of the water. Any nitrate, phosphate, and oxygen will be well mixed to obtain equilibrium. The temperature of the water remained constant for the same reason. * Contrary to my prediction, the dissolved oxygen level in the stream was indeed higher than that in still water. * If varying oxygen levels are not the main cause for the diversity of shrimp density, the cause could be attributed to the different nature of substrates found at different sources. * Faster sections of the stream have more small stones under which the gammarus may cling for shelter to avoid the current. The stone acts as a barrier for the gammarus against the water. Thus the numbers of gammarus in these faster, rockier sections thrive. In slower sections of the stream, more sediment is deposited. This leads to muddy sections of the river bed. Here, gammarus will have less protection from the streams currents. They would have to burrow under the surface of the muddy substrate. This is far difficult than hiding behind a stone. Smaller numbers of gammarus will be able to remain there, thus its density is the lowest in slower sections of the river. * At faster sections of the stream, fewer other species of fresh water organisms will be able to survive due to them being unable to cling in to rocks and being washed away. This means there is less overlapping of the niches of organisms and thus less competition for the shrimps. This means the shrimp population is able to grow larger than areas with slower current speeds.9 To be sure of the assumption above, more tests need to be carried out in site with flow rates of between 0.05-0.15m/s and ;0.05m/s. Discussion Percentage branch cover. Substrate quality. I mentioned carrying out further tests to find out the accuracy of interpolations make from the available data, it is however more likely that as the flow rate of water is increased further, the increase in the number of gammarus found at these sites will not increase in the same proportions as before. A graph of this is shown below: This is due to other limiting factors such as intra species competition. Evaluation Assumptions made to limit In reality, a wide range of factors would act along with the speed of water flow to affect the gammarus population density. Assumptions were made that other factors will not vary greatly since the sampling was conducted in a single river. Although many important variables were tested to confirm that they are indeed fairly constant, there are fluctuations in the concentration of nitrate () at the different sites. This probably will have had an effect for the sample data. For example, the nitrate concentration at the site with the water flow rate of 0.18m/s is 53mg/l compared with the rest of the sites having a nitrate concentration of about 47mg/l. It is instances like this which may limit the reliabilities of the findings. There may be other abiotic factors which I did not have the means to measure affecting the gammarus pulex density. For example, the calcium carbonate concentration of the water is an important issue concerning the density of shrimps. Shrimps require calcium to form and repair their shells. The assumption was made that all of the shrimps which were collected in each sample were correctly classified and tallied. The fact is that it was far from certain that every single shrimp in sample is indeed counted. The classification of the gammarus made difficult by the amount of substrate brought up along with each sample. Large numbers of shrimps in a single sample made counting difficult since they are mostly fast moving. Difficulties caused by method The method caused unavoidable disturbances to both the water and the substrates of the river bed other than that of the sampled area. This is due to that many groups are conductiong investigations in the stream at once. The disturbed water meant that the various abiotic variables of the river is disturbed. It also affects the speed of water flow as people standing in the river unavoibly obstructs the flow of the river. Sources of error Limitations of method * Uneven kicking It is very hard to control the amount of stream bed disturbed by each kick. Although the number of kicks is kept constant, it is very hard to keep constant the area and amount of substrates and fauna sampled each time. * Not all disturbed substrate collected Due to the width of the net, it is impossible to collect every bit of potential sample that is kicked up. * Equipment cross contamination The reflectometers, pH meters which were shared between the groups could have been contaminated with the samples of other groups. Thus giving a higher NO3- level that the actual value etc. * Not all shrimps sampled It cannot be guaranteed that every gammarus collected in the sample will be counted. This could be caused by the size pf the gammarus, problems with identifying, and gammarus hiding below substrates brought up with the sample. The numbers of gammarus counted should be treated as a bare minimum. * Slightly different speeds at different sites Although several impellor readings are taken at different areas within the 0.25m2 area within the quadrat, it is more than likely that there will be areas in the site where the speed will vary. * The dissolved O2 level meter did not work at the site. Therefore the dissolved O2 levels of the water samples collected in bottles were tested back at the lab. To avoid oxygen to be mixed in to the water while inside the bottle, the bottle was filled completely full to the brim. Due to the concave shape of the lids, some air bubbles remained in the bottle. This could have had an effect on the dissolved oxygen levels recorded. * Other investigations taking place upstream * There were other people conducting investigations up stream. This means that the samples I collect could contain some shrimps that have been disturbed and the carried down the stream by the current. This will increased the number of shrimps I collect in some samples. * Errors in classifying species of shrimp * Precision errors of apparatus ; Meter Rule à ¯Ã‚ ¿Ã‚ ½0.5mm ; Flow meter à ¯Ã‚ ¿Ã‚ ½0.01m/s ; Oxygen meter à ¯Ã‚ ¿Ã‚ ½ 1.5% of total scale of 0.0 19.9mg/l ; Reflectometer à ¯Ã‚ ¿Ã‚ ½0.5mg/l ; Digital thermometer à ¯Ã‚ ¿Ã‚ ½0.3 ; Digital pH meter à ¯Ã‚ ¿Ã‚ ½0.2 These contribute to the percentage errors of the results. Anomalous results Anomalous results are highlighted in red in the result table. These are excluded when the average for each site is calculated. This is so that it will affect the reliability of the data. The anomalies would probably have arisen due to the limitations to the method listed above. Improvements * Sample a larger number of sites to further establish a trend. * Sample different rivers to see if the trend is replicated. * Find regions in the stream where the water current is faster to see if the trend continues linearly, or whether there is a cut off point to this positive correlation. * Retest sites which seem to give anomalous results. * Investigate the contribution of substrate quality to shrimp density * Reflectometers could have been contaminated with water samples of other groups. Since the equipment is shared, other groups using the reflectometer to test water samples would have their water left in the testing slot. This will results in the indictor strip changing its colour to another shade thus registering an anomalous NO3 reading. Further work Futher work should be conducted to investigate the relationship between the substrate quality of different sites of the stream and the number of gammarus pulex these sites contain. * Investigate whether the diversity of fresh water fauna is linked with the speed of the water flowing at the point. This will show whether interspecies competition has a major effect on the population density gammarus pulex.

APA citation styles Essay Essay Example

APA citation styles Essay Essay Example APA citation styles Essay Essay APA citation styles Essay Essay Instruction manuals If you are unfamiliar with APA commendation manners. you may happen it helpful to reexamine the stuff inside the Citing beginnings utilizing APA commendation manner booklet before get downing this appraisal. Question 1 Choose the commendation that is in proper APA commendation format for a book. Jenkins. Henry. Fans. bloggers. and gamers researching participatory civilizations. New York New York University Press. 2006. Jenkins. H. Fans. bloggers. and gamers researching participatory civilizations. New York University Press. New York. 2006. Jenkins. H. ( 2006 ) . Fans. bloggers. and gamers researching participatory civilization. New York New York University Press. Jenkins. Henry. ( 2006 ) . Fans. Bloggers. and Gamers Exploring Participatory Culture. New York UP New York. Question 2 Choose the commendation that is in proper APA commendation for a chapter from a book ( no named writer of chapter ) . Cook. V. J. ( 2004 ) . FlavaN Gorillaz Pop Group Names. In Accomodating Brocolli in the Cemetary. ( pp. 21-22 ) . Simon and Schuster New York. Flava n Gorillaz Pop group names. ( 2004 ) . In V. J. Cook. Accomodating Brocolli in the Cemetary ( pp. 21-22 ) . New York Simon and Schuster. Flava n Gorillaz Pop group names. In Cook. V. J. Accomodating Brocolli in the Cemetary ( pp. 21-22 ) . New York Simon and Schuster. 2004. V. J. Cook. 2004. Flavan Gorillaz Pop group names. In Accomodating Brocolli in the Cemetary. pp. 21-22. Simon and Schuster New York. Question 3 Choose the correct APA commendation for a newspaper article. Yonke. D. ( 2008. September 13 ) . Monks on the route for peace Tibetan Buddhists bring message that felicity is an internal event. The Blade ( Toledo. OH ) . p. B7. Yonke. David. ( 2008 ) . Monks on the route for peace Tibetan Buddhists bring message that felicity is an internal event. The Blade ( Toledo. OH ) . pp. B7. Yonke. David. Monks on the route for peace Tibetan Buddhists bring message that felicity is an internal event.

Bruce Springsteen Research Paper Example | Topics and Well Written Essays - 1250 words

Bruce Springsteen - Research Paper Example Nicknamed, â€Å"The Boss,† Bruce Frederick Joseph Springsteen was born on September 23 in the year 1949 in New Jersey. With Elvis Presley as his inspiration to pick up a guitar and start playing, at the age of seven, the future of Rock and Roll has just begun. Because his only interest was to play his guitar and surround himself with music, he was a loner in high school and a drop out in college. In the middle of 1960, he, with the help of sponsors supporting young bands in town, became lead guitarist and then, lead singer of The Castiles. Afterward, by the late 1960s to 1972, he gained local fame, playing with different bands at local clubs in several states, such as Massachusetts, California, and his hometown, New Jersey. His creative songwriting skill and talent captured the attention of Mike Appel, Jim Cretecos and John Hammond, a talent scout of the renowned Columbia Records. Bruce Springsteen put his signature on a record deal with Columbia Records, which was about to c hange his life completely. He also brought his colleagues in New Jersey to record songs with him, forming the E Street Band. When Springsteen released his first album, a number of critics liked a couple of his songs, and was even compared to Bob Dylan . Jon Landau, the ex-Rolling Stone critic wrote, â€Å"I saw Rock and Roll future, and its name is Bruce Springsteen.† After his momentous success, releasing more albums, by 1975, he started to finally gain great success. With the release of Born to Run, the title song has gone up in the charts, and his album reached the Top Ten. Selling out concerts and selling over six million copies, Springsteen’s music achieved mainstream success. He was also able to grace the covers of Time and Newsweek at the same time. However, the forward motion of his success was broken when internal problems started to occur between him and Appel. Springsteen filed a lawsuit against his manager and it was settled after two long years, in 1977. D uring those years of entanglement, Springsteen was not allowed to be in the studio to record, so he channeled his songs to other artists and musicians, composing for Southside Johnny, Patti Smith and Asbury Jukes. He also kept the E Street Band intact by touring at length across the United States. After the settlement of the case, Springsteen was able to record again. In 1978, he released Darkness on the Edge of Town under Landau as the new manager, which marked a change in his musical style. From  the raw and natural, lively lyrics, lengthy compound musical compositions to themes of darkness, night, love and blood. Although most of the songs barely reached chart-topping success, the album indicated a turning point in his life and did attain the number one slot as NME album of the year. Despite the tribulations that occurred, Springsteen was able to gain back and strengthen his success with the help and support of his new manager, Jon Landau. His next album was solemn and serious. Entitled The River, it became the doorway of his future songwriting. It was the first album that confronted and dealt with men, women, marriage, love and family. This album hit number one in the charts and sold over five million copies. A couple of the songs such as â€Å"Hungry Heart† and â€Å"Fade Away† reached the charts as well. Although his later compositions and recordings for his following album

Homeless vietnam veterans and what is being done to help them Essay

Homeless vietnam veterans and what is being done to help them - Essay Example According to the Department of Veteran Affairs, the number of homeless Vietnam era veterans exceeds the number of fatalities that occurred during the war. Statistics show that forty seven percent of the homeless veterans served during the Vietnam Era. At present there are more than 200 community-based veteran organizations, besides the federal and state agencies in the United States, that are working toward providing the best possible care to these unfortunate war veterans. Besides these there are also some organizations in Australia, Canada, and South Korea that are helping the homeless veterans in their nation. Many of them have quite an impressive achievement record. There has been a lot of support and a vast number of people have benefited from the various programs. But statistics still show that more than 600,000 veterans are homeless at some point during the year. U.S. Department of Veterans Affairs (VA) The VA was one of the first organizations that extended its wholehearted a nd sincere support to the homeless Vietnam War Veterans. ... Over the years, the VA has launched many new programs, which dealt with specific problems faced by the war veterans (NCHV Releases FY 2010 Annual Report, 2011). Project CHALLENG In 1994, the VA launched the project CHALENG, which assessed the needs of the homeless veterans living in a particular area and then focused on their health care, education, job assessment, training, placement, and counseling. It also prepared a list of all the homeless services in the local area and encouraged coordinated services, which proved to be much more beneficial than individual efforts (HUD, VA Release Supplemental Report on Veteran Homelessness, 2011). Healthcare for Homeless Veterans (HCHV) Program This program reaches out to the thousands of homeless people who are currently not receiving any kind of benefits and so are most vulnerable. Prompt assistance is offered and the fundamentals problems that led to homelessness are addressed. They are then provided with individual care that includes getti ng physical and mental health care, substance abuse treatment, and help finding food, shelter, clothing and transportation (Homeless Veterans, n.d.). HCHV/Grant Per Diem Program The purpose of this program is to fund community agencies that provide services to the homeless veterans. It promotes the development of supportive housing for the homeless veterans to achieve residential stability. This program provides grants through a competitive process for up to 65% of the costs of construction, renovation, or acquisition of a building for use as service centers or transitional housing for the homeless Veterans. The VA has recently founded a National Call Center. This Homeless Veterans hotline ensures that the homeless Veterans or

Electrochemical Cell Essay Example for Free

Electrochemical Cell Essay Introduction To investigate the effect of change in temperature of the solutions on the voltage of an electrochemical cell. How does increase in temperature of the electrolytes in en electrochemical cell affect the voltage? An electrochemical cell produces electrical energy from chemical energy, where the chemical energy comes from the reactions in the cell. An electrochemical cell consists of two half-cells. Each half-cell consists of an electrode, and an electrolyte (salt solution). A salt bridge is used that connects the two solutions in the containers to allow flow of ions so there is no charge build up in either solution. Charge build-up would shift the equilibrium and the reaction would cease. When the two half cells, consisting of a metal electrode and a conducting solution are connected with an external wire, the strongest oxidizing agent will undergo a reduction in one half cell and the strongest reducing agent will undergo an oxidation in the other half cell. An electrochemical cell makes use of a redox reaction and uses the chemical reaction to produce an electric current. The two metals that will be used in this experiment are Copper and Zinc, and their salts are used in an aqueous form in the container, being CuSO4 and ZnSO4. A salt bridge that is dipped in KNO3 will be used. The following reaction takes place in each half cell: Cu (s) Cu2+ (aq) + 2e- Zn (s) Zn2- (aq) + 2e- Independent Variable: Temperature of the electrolytes (à ¯Ã‚ ¿Ã‚ ½C) Dependant Variable: Voltage (V) Controlled Variables: Nature of electrodes: The electrodes will be of the same elements i.e. Copper and Zinc. Changing the nature of the electrodes will change the voltage since different elements produce different forms of ions which then affects the voltage of the cell. Size of electrodes: The size of electrodes will be kept constant to 6cm x 1cm. Increasing the size of electrodes means that the electrodes will react produce more ions hence increasing the voltage of the cell. Nature of ion transfer: A salt bridge (dipped in KNO3) will be used as a pathway for the ion transfer between the two half cells. Changing the nature of ion transfer will change the amount of ions are transferred between the half cells hence affecting the voltage. The concentration of the electrolytes: is kept constant. A constant amount of metal salt will be added to make each electrolyte. Having a varying concentration will affect the amount of ions produced hence varying the voltage accordingly. Voltmeter: The voltmeter is kept constant since changing the voltmeter can affect the voltage since different voltmeters may have different resistance which may affect the readings. Materials required * Copper strip, 6cm x 1cm * Zinc strip, 6cm x 1cm * CuSO4 solution, 0.99M à ¯Ã‚ ¿Ã‚ ½ 0.01M * ZnSO4 solution, 0.99M à ¯Ã‚ ¿Ã‚ ½ 0.01M * KNO3 solution, 1.99M à ¯Ã‚ ¿Ã‚ ½ 0.01M * Distilled water, 300mL à ¯Ã‚ ¿Ã‚ ½ 1mL * Beakers (3), 250mL à ¯Ã‚ ¿Ã‚ ½ 50mL * Graduated cylinder (100mL à ¯Ã‚ ¿Ã‚ ½ 1mL) * Digital Voltmeter with crocodile wires * Hot plate * Thermometers (2), à ¯Ã‚ ¿Ã‚ ½ 1à ¯Ã‚ ¿Ã‚ ½C * Paper strips, 10cm x 1cm * Magnetic stirrer * Rubber gloves * Apron * Safety Goggles Method Method to prepare solutions 1. Concentration required (CuSO4): 0.99M AMU of CuSO4: 159.61 So, 1.00M of CuSO4 has 159.61g of CuSO4 Hence 0.99M has: 159.61 x 0.99 = 158.01g à ¯Ã‚ ¿Ã‚ ½ 0.01g Mix 158.01g à ¯Ã‚ ¿Ã‚ ½ 0.01g of CuSO4 in 100mL of distilled water. Use a magnetic stirrer if necessary == Use 100mL à ¯Ã‚ ¿Ã‚ ½ 1mL of 0.99M à ¯Ã‚ ¿Ã‚ ½ 0.01M of CuSO4 solution. 2. Concentration required (ZnSO4): 0.99M AMU of ZnSO4: 161.44 So, 1.00M of CuSO4 has 161.44g of ZnSO4 Hence 0.99M has: 161.44 x 0.99 = 159.83g à ¯Ã‚ ¿Ã‚ ½ 0.01g Mix 159.83g à ¯Ã‚ ¿Ã‚ ½ 0.01g of ZnSO4 in 100mL of distilled water. Use a magnetic stirrer if necessary == Use 100mL à ¯Ã‚ ¿Ã‚ ½ 1mL of 0.99M à ¯Ã‚ ¿Ã‚ ½ 0.01M of ZnSO4 solution. 3. Concentration required (KNO3): 1.99M AMU of CuSO4: 101.11 So, 1.0M of CuSO4 has 101.11g of KNO3 Hence 1.99M has: 101.11 x 1.99 = 201.21g à ¯Ã‚ ¿Ã‚ ½ 0.01g Mix 201.21g à ¯Ã‚ ¿Ã‚ ½ 0.01g of KNO3 in 100mL of distilled water. Use a magnetic stirrer if necessary == Use 30mL à ¯Ã‚ ¿Ã‚ ½ 1mL of 1.99M à ¯Ã‚ ¿Ã‚ ½ 0.01M of KNO3 solution. 4. Now put the paper strip (salt bridge) in the KNO3 solution and leave it for 30 seconds. Method for investigation 1. Before starting the experiments, all the materials should be acquired with all safety precautions 2. Put the two beakers that have electrolytes on the hot plate. 3. Now put the salt bridge between the beakers. Also, put the two thermometers in each container 4. Connect the crocodile wires from the voltmeter to each electrode, but dont put it in the half cells yet. 5. Now turn on the hot plate and let the temperature increase from room temperature to 30à ¯Ã‚ ¿Ã‚ ½C 6. As soon as the temperature increases to 30à ¯Ã‚ ¿Ã‚ ½C, quickly insert the electrodes in the respective solutions (Cu in CuSO4 and Zn in ZnSO4) and record the voltage 7. Remove the electrodes and clean and dry them. 8. Now increase the temperature by a difference of 10à ¯Ã‚ ¿Ã‚ ½C i.e. 40à ¯Ã‚ ¿Ã‚ ½C, 50à ¯Ã‚ ¿Ã‚ ½C, 60à ¯Ã‚ ¿Ã‚ ½C, 70à ¯Ã‚ ¿Ã‚ ½C, 80à ¯Ã‚ ¿Ã‚ ½C and 90à ¯Ã‚ ¿Ã‚ ½C and repeat steps 5-7. 9. After the experiment has been completed, put the cleaned materials back to their original place. Raw Data Table Volume of each electrolyte (mL à ¯Ã‚ ¿Ã‚ ½ 1mL) Length of salt bridge (cm à ¯Ã‚ ¿Ã‚ ½ 0.01 cm) Length of each electrode (cm à ¯Ã‚ ¿Ã‚ ½ 0.01 cm)

Rights Of Egyptian Women Essay -- essays research papers fc

Rights of Egyptian Women Throughout written history, women have experienced status subservient to the men they lived with. Generally, most cultures known to modern historians followed a standard pattern of males assigned the role of protector and provider while women were assigned roles of domestic servitude. Scholars speculate endlessly at the cause: biology, religion, social custom. Nevertheless, the women were always subordinated to the men in their culture. Through their artwork, tomb inscriptions, and papyrus and leather scrolls, preserved in the dry, desert air, Ancient Egyptians left evidence for scholars suggesting that Egypt was once a peculiar exception to this pattern. Anthropological evidence suggests that unusual circumstances in Ancient Egyptian culture provided for women to be given equal status to their male counterparts: notably, matrilineal inheritance and emphasis on the joy of family life over maintaining ethnic purity. Legally, women in Ancient Egypt held the same legal rights as men. A woman could own property and manage it as she saw fit. One example of this, the Inscription of Mes, provided scholars with proof that women could manage property, institute litigation, and could act as a witness before a court of law. Surviving court documents not only showed that women were free to take action with the court, but the documents also show that they frequently won their cases. They could also enter contracts and travel freely, unescorted, throughout the state. This is a great contrast to women in Greece, who were required to act through a male representative. Interestingly, property and its administration was passed from mother to daughter, matrilineally. The Egyptians relied on matrilineal heritage, based on the assumption that maternal ancestors are less disputable than paternal ones. The effect of legal equality in writing and practice coupled with the ownership and administration of property led to an ensured equality. The rights and egalitarian conditions enjoyed by Egyptian women shocked the conquering Greeks. In 450 BC, Greek historian Herodotus noted: They Egyptians, in their manners and customs, seem to have reversed the ordinary practices of mankind. For instance, women attend market and are employed in trade,... ...providing scholars with an examples of conditions that brought about a particularly benign development of male-dominance in Ancient Egypt. Sources Cited: Tansey, Richard. Gardner's Art Through the Ages. Fort Worth: Harcourt Brace Publishers, 1996 91-93. Tyldesley, Joyce. Daughters of Isis. New York: Penguin Books Ltd, 1994. Bibliography Ahmed, Leila. Women and gender in Islam: historical roots of a modern debate. London: Yale University Press, 1992. Lesko, Barbara S. Women's Earliest Records. Atlanta, GA: Scholar's Press, 1989. Piccione, Peter A. "The Status of Women in Ancient Egyptian Society" History of Ancient Egypt Page. http://www.library.nwu.edu/class/history/B94/B94women.html 16 Oct, 1996 Robins, Gay. Women in Ancient Egypt. London: British Museum Publications, 1993. Tucker, Judith E. Arab Women: Old Boundaries, New Frontiers. Indianapolis: Indiana University Press, 1993. Tyldesley, Joyce. Daughters of Isis. New York: Penguin Books Ltd, 1994. Unesco. Social Science Research and Women in the Arab World. London: Frances Pinter, 1984. Watterson, Barbara. Women in Ancient Egypt. Great Britain: Alan Sutton Publishing, 1991.

History Comparison Betwen Mexican and African Americans Essay

The history of Mexican Americans is comparable to that of African Americans: filled with stories of conquest, racism, and discriminatory acts posed by society. The past has triggered Chicanos to fight back against injustices, in hopes of reforming immoral treatment, and emerging as an equal part of America’s society. The Chicano movement yielded some successes in this aspect. However, mass media and stereotypes confirm the notion that Mexican Americans are still viewed as a â€Å"lesser† people. This stems from the long-established concept of racial stratification. In this case, it indicates that Anglo-Americans have hierarchy over Mexican Americans. Consequently, discrimination towards Chicanos is still prevalent, despite ongoing efforts by activists for change. This nation was socially molded based on the idea that there is a hierarchy of races, and as long as that idea exists, Mexican Americans will continue to suffer inequality. In â€Å"Sexual Violence in the Politics of Conquest’, Castaneda explores the sexual crimes against Amerindian women during the Spanish conquest of Alta California. The soldiers accompanying the missionaries on the settlement raped and violated the native women openly. There were many incidents before rules were set to govern the matter, but even after the rapes continued to occur. One court case recorded in 1773 indicates that there was no intention to grant justice to the victims. The natives took matters into their own hands and formed forces to seek their own justice (similar to Chicano activist groups that seek reform for discrimination), but to no avail. Castaneda goes on to explain that the actions of the soldiers were not farfetched from practices of Western civilization (27-28). Because these dark crimes were normal for the dominant culture, they were automatically imposed on the natives, who were supposed to accept this without resistance. This is similar to Mexican Americans during the Chicano movement, who were not given equal opportunities for education and employment because they were not in the central group. In both situations, the majority emasculates the men and oppresses the women of the minority. The idea of hierarchy is apparent in this passage; Catholic missionaries try to strip the natives of their culture and convert them to value Western practices because they consider themselves the ‘prominent’ people. The history of the Chicano Movement can date back to the Manifest Destiny. In the 1840s, the United States planned to expand its territory and take Mexico, which had become independent from Spain. In reporting these events, Leo Cervantes notes the attitude of superiority that the Americans displayed in their imperialist plan. He notes one adherent’s thoughts, who asked â€Å"why resign this beautiful country to the custody of the ignorant cowards who have ruled for the last 25 years? † (13). Cervantes also quotes Thomas Jefferson, who has similar views of the matter, and promoted â€Å"policies of non-miscegenation† during the expansion (14). Even before Anglo-Americans were acquainted with Mexicans, they held predisposed opinions of contempt for them. As I suggested, Arturo Rosales agrees, â€Å"An underlying cause for the hostility Anglo-Americans felt for Mexicans was a preexisting ideology of racism† (5). These preconceived notions of Mexican Americans were the beginning of negative stereotypes attached to them. Today Chicanos are often represented in the media as uneducated thugs, loose women, or undocumented workers. Even whites who claim they are not racist may practice aversive racism by absorbing the images portrayed in media. It is this ideology of racism has contributed to discrimination over the years and inversely, the building of the Chicano Movement. The movement flourished in the 1950s and 1960s, feeding off other civil rights movements, particularly the African American movement. Both African American civil rights activists and Chicano activist protested the unlawful repression of minorities in America. They protested the terrible education system, police brutality, and denial of economic opportunities. Arturo Rosales compares Chicano activist, Cesar Chavez to Martin Luther King. It is expected that on this path to address the plight and repression of their people, Chicanos were met with resistance from White Americans. Rosales notes that police officers and other uniformed officials â€Å"were employed to suppress manifestations of discontent and did so using violence† (xv). It can be suggested that Anglo-Americans considered Chicanos a threat to the racial hierarchy, so they took action. Cervantes supports this theory, quoting Brooks Adams who said, â€Å"When a highly centralized society disintegrates, under the pressure of economics condition, it is because the energy of the race has been exhausted (18). This point illustrates the pressure Anglo-Americans felt to keep superiority over Mexicans. The American achievement ideology suggests four points: Anyone can make it. American society is fair and open. Success is based on merit. Moreover, inequality is the result of differences in ability and ambition. This ideology contradicts the apparent effects of a racial hierarchy. Stratification of races has formed structural discrimination among minorities, specifically, Mexican and African Americans. The poor education, poor neighborhoods, and badly equipped jobs that these minorities are subjected to prevent them from achieving upward mobility. However, white America still neglects to acknowledge these factors. Historian, Oscar Lewis, believed that people living in poverty are to blame for their own situation, yet minorities’ history in America consists of repression and treatment as inferior beings. There is no questioning it; racial classes have been socially constructed and this has directly affected minorities. The Chicano Movement has led to some advances for Mexican American such as the growing numbers of Latinos attending school, and raise concerns about unequal treatment to Chicanos. However, because underlying values of America are products of a deep-rooted, corrupt social structure, issue of prejudice will continue to exist.