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What is an independent variable?

Back

An independent variable is the factor that is changed or manipulated in an experiment to observe its effect on the dependent variable.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-4

Front

What is a dependent variable?

Back

A dependent variable is the factor that is measured or observed in an experiment, which is affected by changes in the independent variable.

Front

In an experiment, what does the independent variable represent?

Back

The independent variable represents the cause or input that is changed to test its effect.

Tags

NGSS.MS-PS3-4

Front

In an experiment, what does the dependent variable represent?

Back

The dependent variable represents the effect or outcome that is measured in response to changes in the independent variable.

Front

Identify the independent variable in the experiment: 'How does the amount of water affect plant growth?'

Back

The amount of water.

Front

Identify the dependent variable in the experiment: 'How does the amount of water affect plant growth?'

Back

The growth of the plant.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Front

What is the role of controlled variables in an experiment?

Back

Controlled variables are factors that are kept constant to ensure that the results are due to the independent variable only.

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Why is it important to identify independent and dependent variables in an experiment?

Back

Identifying these variables helps to clarify the relationship being tested and ensures a structured approach to experimentation.

Tags

NGSS.MS-PS3-4

Front

Example of an independent variable: 'How does temperature affect the rate of a chemical reaction?'

Back

Temperature.

Tags

NGSS.MS-PS1-4

Front

Example of a dependent variable: 'How does temperature affect the rate of a chemical reaction?'

Back

The rate of the chemical reaction.

Tags

NGSS.MS-PS1-4