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An Investigation into Fresh Water Pollution in Epping Forest

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Introduction

GCSE Environmental Science Coursework An Investigation into Fresh Water Pollution in Epping Forest Centre Name & Number: Mill Hill County high school: 12262 Candidate Name & Number: Tejesh Patel: 1584 Contents Summary Section Number Page Number 1 Plan Sheet 3 2 Introduction 4 2.1 Topic Choice 2.2 Location 2.3 Aim 2.4 Information required 3 Method 6 3.1 Step by Step Method Description 3.2 Reasons for choice of Methods 3.3 Method Controls 3.4 Risk Assessment 4 Results 11 4.1 Table of Results 4.2 Presentation of Results 5 Conclusion 16 5.1 Trends, patterns and anomalies 5.2 Conclusion of Hypotheses 6 Discussion 20 6.1 Relation to Scientific Theories 6.2 Problems & Issues 6.3 Suggested Solutions 6.4 People's Attitudes and Values 7 Evaluation 26 7.1 Observation Accuracy 7.2 Explanation to Anomalies 7.3 Method Improvements 7.4 Extensions to the Investigation 8 Bibliography and Acknowledgements 30 8.1 Bibliography 8.2 Acknowledgements 9 Appendix 31 9.1 Field notes and results 2 Introduction 2.1 Topic Choice The reason for choosing the topic "An Investigation into Fresh Water Pollution" is that in many ways we are all affected by water pollution. ...read more.

Middle

Time yourself for 15 seconds. Place the contents in the net on to the tray and fill the pot with river water. Rinse the net with the water from the river, fill it back up again and start searching for any invertebrates. If any are found place them in the pot make sure fish are not placed with any of the invertebrates as they may eat them. Identify what invertebrates you found and record them on a recording sheet. Finally carefully tip the invertebrates back into the water. Then repeat the method to further check your results. This particular method was selected as it provides us with the information we need efficiently, any other method would cost too much money or take a lot more time. Controls: the sampler must kick for fifteen seconds at one foot away from the net; they must gently kick in every sample so it would be a fair test. The site is only kick sampled at one area. This means we would only find out what invertebrates lived in one area this limits us from more accurate information. The ground was uneven and very slippery so you have to be very careful and walk slowly. ...read more.

Conclusion

Drop the cork in at one end and time it, when it reaches the other end stop the timer and record your results. Do this three times and take an average. Controls: when measuring depth keeps the ruler at an angle or the water will flow straight into it and the water level will increase. Do not put down hard on the measure stick or the ruler may g through the riverbed. When measuring velocity makes sure you drop the cork at the same height every time. There are no risks involved with this method. * Temperature A higher temperature may mean that some invertebrates are not able to live in those waters, as they are not sustainable for certain types of life. Apparatus needed for the experiment: thermometer Place the thermometer in the river; make sure the temperature has stabilized before recording it in your recording sheet. There are no risks for this method but the temperature will be affected by the time of year and the time of day. Results The numbers of samples taken were adequate and were large enough to make my results worthwhile. Fifteen samples were taken from each area; each sample was taken at a different place along the river. Below are the results from Pyrles Brook ...read more.

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