Independent and Dependent Variables

In a science fair, David is conducting an experiment to understand the effect of different amounts of sunlight on the growth of a plant. In this scenario, what is the independent variable?

• The amount of sunlight that David manipulates or controls.

• A variable that is determined by chance in David's experiment.

• A variable that is not relevant to David's experiment.

• The growth of the plant that David measures or observes.

Henry, James, and Avery are conducting an experiment. In their experiment, what would be considered a dependent variable?

• A dependent variable is the variable that Henry, James, and Avery manipulate or change in their experiment.

• A dependent variable is the variable that is controlled by Henry, James, and Avery in their experiment.

• A dependent variable is the variable being measured or observed by Henry, James, and Avery in their experiment.

• A dependent variable is the variable that is not affected by the independent variable in Henry, James, and Avery's experiment.

In a science fair, Aiden is conducting an experiment. Which variable is Aiden manipulating or changing in his experiment?

• independent variable

• extraneous variable

• control variable

• dependent variable

In a science fair, Mia and Ava are conducting an experiment. They are observing the growth of a plant under different light conditions. In this experiment, which variable is the one that they are measuring or observing?

• the type of light (independent variable)

• the type of plant (control variable)

• the room temperature (extraneous variable)

• the growth of the plant (dependent variable)

Priya is conducting an experiment to see how different amounts of sunlight affect the growth of her plants. What is the purpose of the amount of sunlight (an independent variable) in her experiment?

• To observe its effect on the growth of the plants (the dependent variable).

• To determine the number of plants (sample size) Priya needs.

• To collect data for Priya's analysis.

• To control the conditions of Priya's experiment.

Henry, Ava, and Kai are conducting a physics experiment where they drop a ball from different heights. In this scenario, give an example of a dependent variable.

• The height from which Henry drops the ball.

• The time it takes for the ball to fall to the ground when Ava drops it.

• The mass of the ball that Kai is dropping.

• The speed at which Henry drops the ball.

In a science experiment, Elijah is studying the effect of different amounts of sunlight on the growth of a plant. How are the amount of sunlight (independent variable) and the growth of the plant (dependent variable) related in Elijah's experiment?

• The growth of the plant (dependent variable) is manipulated by Elijah, while the amount of sunlight (independent variable) is measured or observed and is affected by the growth of the plant.

• The amount of sunlight (independent variable) is manipulated by Elijah, while the growth of the plant (dependent variable) is measured or observed and is affected by the amount of sunlight.

• The growth of the plant (dependent variable) is controlled by Elijah, while the amount of sunlight (independent variable) is not controlled.

• The amount of sunlight (independent variable) is not affected by the growth of the plant (dependent variable).

In a science fair, Abigail is conducting an experiment to determine the effect of different types of soil on plant growth. What is the role of the control group in Abigail's experiment?

• To provide a standard for comparison, such as plants grown in normal soil.

• To manipulate the independent variable, such as changing the type of soil.

• To measure the dependent variable, such as the growth of the plants.

• To determine the cause and effect relationship between the type of soil and plant growth.

In a science fair, Elijah is conducting an experiment to determine the effect of different types of soil on plant growth. What would be a control variable in his experiment?

• A variable that Elijah manipulates, like the type of soil used.

• A variable that remains constant and unchanged throughout the course of the experiment, like the amount of sunlight each plant receives.

• A variable that is measured or observed in the experiment, like the growth of the plants.

• A variable that is not relevant to the experiment, like the color of the pots used.

Ethan, Noah, and Grace are conducting a science experiment. What happens if Ethan does not properly control the independent variable in their experiment?

• The dependent variable, which Noah is observing, will not be affected.

• The results of their experiment may not be valid.

• The control variable, which Grace is handling, will become the independent variable.

• The sample size of their experiment will increase.