Question

read the description of a laboratory investigation below and then answer the following questions. an experiment was designed to investigate the effect of ibuprofen on the amount of stomach acid produced in mice. two hundred mice were gathered. all mice lived in the same environment with the same temperature and amount of light. all given no ibuprofen, 50 mice were given 200 mg of ibuprofen a day, 50 mice were given 400 mg of ibuprofen a day, and 50 mice were given 800 mg of ibuprofen a day. the amount of stomach acid in the mice was measured every day for 20 days. 27. what is the independent variable in this experiment? a. type of food b. different mice c. amount of stomach acid d. amount of ibuprofen given 28. what is the dependent variable in this experiment? a. type of food b. different mice c. amount of stomach acid d. amount of ibuprofen given

Explanation:

In an experiment, the independent variable is what the researcher manipulates, and the dependent variable is what is measured as a result of the manipulation. Here, the amount of ibuprofen given is manipulated, and the amount of stomach - acid in the mice is being measured. So the independent variable is the amount of ibuprofen given and the dependent variable is the amount of stomach acid.

Answer:

1. C. Amount of Ibuprofen given
2. C. Amount of stomach acid