H2 small in text questions

a. They did not test the drug on pregnant animals.

H2 small in text questions

b. Measure the heights of all the seedlings.

c. Control all the variables. Repeat readings will be similar so the experiment is reliable. The investigation will answer the original question.

d. The more light that shines on a plant ,the taller the plant grows.

H2 small in text questions

H2

ordered

catagoric

continuous

Research would be more reliable and valid if the same results were obtained by other scientists

(Also bias would be unlikely) H2 marks: 8