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.
By Ashley Crossman. Definition: A control variable is a variable that is held constant in a research analysis. The use of control variables is generally done to answer four basic kinds of questions: 1.Is an observed relationship between two variables just a statistical accident? 2.efinition: A control variable is a variable that is held constant in a research analysis.