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Lab Practice Questions - Scientiflc Method 1. You want to test the effects of caffeine on the sleeping pattern in mice. Which of the following would be the dependent variable? a. The size of cages the mice are kept in. b. The amount of caffeine given to the mice. c. The difference in behavior of the mice. d. The type of food that the mice are fed. 2. You want to test the effects of caffeine on the sleeping pattern in mice. Which of the following would be a controlled variable? a. The size of cages the mice are kept in. b. The amount of caffeine given to the mice. c. The type of food that the mice are fed. d. Both a and c. 3. You want to test the effects of caffeine on the sleeping pattern in mice. Which of the following would be the independent variable? a. The size of cages the mice are kept in. b. The amount of caffeine given to the mice. c. The difference in behavior of the mice. d. The type of food that the mice are fed. 4. When walking a forest, you notice a particular type of birds seems to have all their tree-hole ness on the south facing side of trees. This is an example of: a. A prediction b. A hypothesis c. A theory d. An observation