Page 23 - 新思维科学活动用书8 样章

1 Respiration

3 What was the independent variable in the experiment?

4 What was the dependent variable in the experiment?

5 Suggest two variables that the scientists should have kept the same.

6 Calculate the increase in red blood cell count for the rats at high altitude from day 1 to day 20.
Show your working.

7 Use your answer to question 6 to calculate the mean rate of increase per day.

Show your working.

8 After 20 days, the rats at high altitude were taken back down to sea level.
Predict what would happen to their red blood cell count over the next few weeks.
Explain your answer.

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