Research 7

What is a variable in an experiment?

• A guess you make

• Something that changes or can be controlled

• A tool used to measure

• The result you get after the experiment

Which variable is changed by the scientist in an experiment?

• Dependent variable

• Independent variable

• Controlled variable

• Random variable

What is the variable that is measured in an experiment?

• Dependent variable

• Independent variable

• Controlled variable

• Extra variable

Which of these is an example of a controlled variable?

• The type of soil in a plant growth experiment

• The height of a plant after a week

• The amount of water given to plants

• The number of days plants are measured

If you want to test how sunlight affects plant growth, what is the independent variable?

• The height of the plant

• The amount of sunlight

• The type of plant

• The pot used

Why is it important to know the independent variable in an experiment?

• To know what you will measure

• To control all the results

• To identify what you are changing

• To choose the tools for the Experiment

What is the main difference between a dependent and independent variable?

• The dependent variable is changed, and the independent variable is measured.

• The independent variable is changed, and the dependent variable is measured.

• Both are measured in an experiment.

• Neither is controlled during an experiment.

What is the independent variable in an experiment?

• The variable that is Measured

• The variable that is changed

• The variable that stays the same

• The result of the experiment

What is the dependent variable in an experiment?

• The variable that is controlled

• The variable that is changed

• The variable that is measured

• The variable that is ignored

Explain the purpose of a controlled variable in an experiment.

• To measure results

• To change the outcome

• To keep conditions fair and consistent

• To create different results