Science Worksheet: Identifying Variables | PDF - Free Printable

Science Worksheet: Identifying Variables

1.
- Dependent variable: Speed in solving long division problems
- Independent variable: Use of calculators (whether or not they had calculators)
- Control variable: The type of long division problems given

2.
- Dependent variable: Time taken to assemble the jigsaw puzzle
- Independent variable: Grade level of students
- Control variable: The same jigsaw puzzle

3.
- Dependent variable: Height of the beans grown
- Independent variable: Type of liquid used (coca-cola, lemonade, water)
- Control variable: Amount of liquid given, type of beans, amount of sunlight, soil type, pot size, time period (one week)

4.
- Dependent variable: Growth of Marigolds
- Independent variable: Type of fertilizer used (Miracle Grow, Scotts Fertilizer, none)
- Control variable: Type of Marigold plant, amount of sunlight, soil type, watering schedule, pot size

5.
- Dependent variable: Grades on science work
- Independent variable: Number of apples eaten per day

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Explanation of Variables:

- Dependent Variable: This is what you are measuring or observing — the outcome that may change based on the independent variable.
- Independent Variable: This is the factor that is deliberately changed or manipulated in the experiment.
- Control Variable: These are factors kept constant so that only the independent variable affects the dependent variable.

In each case, the answers above reflect these definitions based on the experimental setup described.