Independent and Dependent Variables

In an experiment to test the effect of sunlight on plant growth, what is the independent variable?

• Amount of water given to the plants

• Type of soil used

• Amount of sunlight received

• Height of the plants

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DOK Level 1: Recall

Which of the following is a dependent variable in an experiment measuring the effect of fertilizer on plant height?

• Type of fertilizer used

• Amount of fertilizer used

• Height of the plants

• Type of plants used

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DOK Level 1: Recall

In an experiment, if you are testing how different temperatures affect the rate of a chemical reaction, what is the dependent variable?

• Temperature

• Rate of the chemical reaction

• Type of chemical used

• Volume of the chemical

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DOK Level 1: Recall

Which of the following best describes the relationship between an independent variable and a dependent variable?

• The independent variable is changed to observe its effect on the dependent variable.

• The dependent variable is changed to observe its effect on the independent variable.

• Both variables are changed simultaneously.

• Neither variable is changed.

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DOK Level 2: Skill/Concept

In an experiment to determine the effect of different amounts of sleep on test scores, what would be the independent variable?

• Test scores

• Amount of sleep

• Type of test

• Time of day the test is taken

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DOK Level 2: Skill/Concept

You are designing an experiment to test the effect of different types of music on concentration levels. What would be a suitable dependent variable?

• Type of music

• Volume of music

• Concentration levels

• Duration of the experiment

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DOK Level 2: Skill/Concept

In an experiment to test the effect of different fertilizers on plant growth, you measure the height of the plants every week. What is the dependent variable?

• Type of fertilizer

• Height of the plants

• Amount of water

• Type of plants

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DOK Level 1: Recall

You are asked to design an experiment to test how the amount of exercise affects heart rate. Which of the following would be the independent variable?

• Heart rate

• Amount of exercise

• Type of exercise

• Age of participants

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DOK Level 2: Skill/Concept

In an experiment to determine the effect of different amounts of water on plant growth, what is the dependent variable?

• Amount of water

• Type of plant

• Growth of the plant

• Type of soil

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DOK Level 1: Recall

You are analyzing data from an experiment where different amounts of light were given to plants to see how it affects their growth. What is the independent variable?

• Amount of light

• Growth of the plants

• Type of plant

• Type of soil

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DOK Level 2: Skill/Concept