Understanding Controls and Variables
A Grade 7 science worksheet focusing on identifying and understanding independent, dependent, and controlled variables in scientific experiments.
Includes
Standards
Understanding Controls and Variables
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Date:
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Read each question carefully and provide your best answer. This worksheet will test your knowledge of independent, dependent, and controlled variables in scientific experiments.
1. The variable that is changed or manipulated by the scientist in an experiment is called the variable.
2. The variable that is measured or observed as a result of the experiment is the variable.
3. Factors that are kept the same throughout an experiment to ensure a fair test are called variables.
4. A scientist wants to test if different types of fertilizer affect the growth of plants. What is the independent variable in this experiment?
The amount of water
The type of fertilizer
The height of the plants
The amount of sunlight
5. In the same experiment (different types of fertilizer affecting plant growth), what would be a dependent variable?
The type of soil
The temperature of the room
The number of leaves on the plant
The brand of plant pot
6. A control group in an experiment receives the same treatment as the experimental group.
True
False
7. Keeping the amount of water given to plants the same in an experiment is an example of controlling a variable.
True
False
8. A student wants to investigate if the color of light affects how quickly ice melts. Design a simple experiment by identifying the independent variable, dependent variable, and at least two controlled variables.
Independent Variable:
Dependent Variable:
Controlled Variables:
9. Observe the image below. If this setup was used to test how the amount of salt affects the boiling point of water, identify:
Independent Variable:
Dependent Variable:
Two Controlled Variables:
a.
b.