Research Review

In a science experiment, Ethan is testing how different amounts of sunlight affect the growth of his plants. What is a variable in this experiment?

• A guess Ethan makes

• Something that changes or can be controlled

• A tool used to measure

• The result Ethan gets after the experiment

Nora is conducting an experiment to see how different amounts of sunlight affect the growth of her plants. Which variable is changed by Nora in her experiment?

• Dependent variable

• Independent variable

• Controlled variable

• Random variable

In a science experiment, Priya is testing how different amounts of sunlight affect the growth of her plants. What is the variable that is measured in this experiment?

• Dependent variable

• Independent variable

• Controlled variable

• Extra variable

In James's plant growth experiment, which of these is an example of a controlled variable?

• The type of soil in James's 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

Benjamin wants to test how sunlight affects the growth of his tomato plants. What is the independent variable?

• The height of the tomato plants

• The amount of sunlight

• The type of tomato plant

• The pot used

In a science class, Ethan is conducting an experiment to see how different amounts of sunlight affect the growth of plants. Why is it important for Ethan to know the independent variable in his 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

In a science experiment, Jackson is testing how different amounts of sunlight affect the growth of his plants. What is the main difference between a dependent and independent variable in this context?

• 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.

In a science experiment, Anika is testing how different amounts of sunlight affect the growth of her plants. What is the independent variable in her experiment?

• The amount of sunlight that is measured

• The amount of sunlight that is changed

• The amount of water that stays the same

• The height of the plants as a result of the experiment

In a science experiment, Priya is testing how different amounts of sunlight affect the growth of her plants. What is the dependent variable in her experiment?

• The amount of sunlight that is controlled

• The amount of sunlight that is changed

• The height of the plants that is measured

• The type of plants that is ignored

In a science experiment, Henry is testing how different amounts of sunlight affect the growth of plants. He decides to keep the type of soil and the amount of water constant for all the plants. Explain the purpose of a controlled variable in this experiment.

• To measure results

• To change the outcome

• To keep conditions fair and consistent

• To create different results