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Investigating enzyme trypsin

Investigating enzyme trypsin. Planning your experiment. Background research : Literature Research you have done before you have done any practical work. Preliminary test A quick experiment used to work out how you will do the investigation and sometimes what your hypothesis will be

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Investigating enzyme trypsin

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  1. Investigating enzyme trypsin

  2. Planning your experiment • Background research: Literature Research you have done before you have done any practical work. • Preliminary test A quick experiment used to work out how you will do the investigation and sometimes what your hypothesis will be • Hypothesis: A prediction that you will test using the practical. Usually background research/preliminary experiment helps you come up with a reasonable prediction

  3. Fair testing: Variables are things that can change. You need to decide what variables to keep the same Independent variable: This is the factor that you are choosing to change, so you can investigate how this factor affects the results Dependant variable: This is the results from the experiment. It is a change caused by the experiment. It is the factor that you are measuring in the experiment

  4. Control This is when a sample that has not been treated with the factors that you are investigation. This is to confirm that changes would only happen because of independent variables

  5. Implementation of experiment • Always record you results in a results table

  6. Written method • Ideally this should be in past tense (as you’ve just done the experiment so you’re writing about what you just did) • An A grade student will produce a method that is: • A sequence of sentences written in a logical way • Complex sentences (what and why sentences linked together using connectives) • Technical vocabulary • There is agreement of tense and the use of nouns (objects/persons)

  7. Use connectives in your method

  8. Sequencing connectives is usually used in method: First/firstly/First of all Second/secondly, Third/thirdly, Next, Then, Finally, Meanwhile, After/afterwards

  9. Task: Write a method on how to make a cup of tea

  10. The duck in the picture above lives by a canal that was once surrounded by empty fields. Eight years ago, houses and a shopping complex was built in place of the fields. State what you see in the picture and then reach a conclusion about WHY the duck is in this situation Your answer:

  11. Conclusion • Analyse you results and decide if your hypothesis is correct/incorrect • In Science you tend you present your results in a graph to make it visual so you can spot any trends Dependent variable Independent variable

  12. Evaluation • Reflect on the investigation • Positives/Negatives. • What could be improved?

  13. Evaluate travelling by car to go to Worcester town centre

  14. Abstract • This is a summary of a report on a scientific investigation • A short paragraph • Helps someone decide if a scientific report is worth reading/relevant to what they are interested in

  15. Typing up a scientific report • Needs to be impersonal / third person • Needs to be in past tense • Structure of scientific report should be: • Abstract • Background research • Hypothesis • Method and Evaluation (merged together) • Results • Conclusion

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