Biology Isa Specimen Essay Example
Section 1
These questions are about your investigation with DCPIP and measuring Vitamin C. You should use your own results, your graph/s and what you remember about doing your investigation to answer these questions. All answers should be in the spaces provided.
1 What were you trying to find out in your investigation? Complete the blank spaces in the sentence below. I was trying to find out if the ……………….……………………………………………….. ………………………………………………………………………...……… depends on the ………………………………………………………………………………………………… (1 mark)
2 (a) In your investigation, which was the independent variable that you deliberately changed? …………………………………………………………………………………………... (1 mark) (b) What was the range of your independent variable? …………………………………………………………………………………………... …………………………………………………………………………………………... (1 mark)
3 Did you repeat any of your readings? Answer yes or no and give a reason for your answer ……………………………………………………………………………………………......... (1 mark)
4 In your experiment you measured the number of drops of fruit juice required to remove the colour from the DCPIP solution. (a) Was this a good method of measuring the Vitamin C content? Answer yes or no and give a reason for your answer …………………………………………………………………………………………... (1 mark) (b) If you had used measuring apparatus with a smaller scale division what would this have increased? Tick the box beside the correct answer
Accuracy Precision Reliability Validity (1 mark)
5 Before you carried out your experiment, either you or your teacher would have carried out a preliminary test. Why was this done? ……………………………………………………………………………………………......... ……………………………………………………………………………………………......... (1 mark)
6 Look back to Question 1 where you wrote down what you were trying to find out. Now write down what you did find out from this investigation. …………………………………………………………………………………………….........
These questions are about your investigation with DCPIP and measuring Vitamin C. You should use your own results, your graph/s and what you remember about doing your investigation to answer these questions. All answers should be in the spaces provided.
1 What were you trying to find out in your investigation? Complete the blank spaces in the sentence below. I was trying to find out if the ……………….……………………………………………….. ………………………………………………………………………...……… depends on the ………………………………………………………………………………………………… (1 mark)
2 (a) In your investigation, which was the independent variable that you deliberately changed? …………………………………………………………………………………………... (1 mark) (b) What was the range of your independent variable? …………………………………………………………………………………………... …………………………………………………………………………………………... (1 mark)
3 Did you repeat any of your readings? Answer yes or no and give a reason for your answer ……………………………………………………………………………………………......... (1 mark)
4 In your experiment you measured the number of drops of fruit juice required to remove the colour from the DCPIP solution. (a) Was this a good method of measuring the Vitamin C content? Answer yes or no and give a reason for your answer …………………………………………………………………………………………... (1 mark) (b) If you had used measuring apparatus with a smaller scale division what would this have increased? Tick the box beside the correct answer
Accuracy Precision Reliability Validity (1 mark)
5 Before you carried out your experiment, either you or your teacher would have carried out a preliminary test. Why was this done? ……………………………………………………………………………………………......... ……………………………………………………………………………………………......... (1 mark)
6 Look back to Question 1 where you wrote down what you were trying to find out. Now write down what you did find out from this investigation. …………………………………………………………………………………………….........