If the bat is captured during the day proceed to step 5. If the bat is captured at night and does not appear to be a baby bat, proceed to step 3. Important note!: Do not place the bat in a bird cage or container with small openings. Bats are very intelligent and can easily squeeze through a 1/4 x 1/2 inch crack.
These changing quantities are called variables. A variable is any factor, trait, or condition that can exist in differing amounts or types. An experiment usually has three kinds of variables: independent, dependent, and controlled. The independent variable is the one that is changed by the scientist. To ensure a fair test, a good experiment has only one independent variable. As the scientist changes the independent variable, he or she observes what happens.
The independent variable is the variable that is different between the groups compared: all the members of one group will have the same level of the independent variable, a second group will have a different level of that same variable, and the same for a 3rd or 4th group, if present. is the independent variable and Y is the dependent variable-the outcome, and Z is the type of subjects represented. A simple example would be: The effects of tomatoes on risk of prostate cancer in Scandinavian men.