Learning Objectives - Planning and Conducting

In science, what is a variable?

• A) Anything that can be controlled, changed or measured in an experiment

• B) Only something that can be measured

• C) Only something that can be changed

• D) Only something that can be controlled

There are three types of variables in an investigation: ________, dependent, and independent variables.

• controlled

• random

• manipulated

• extraneous

Which of the following is NOT a type of variable in an investigation?

• Controlled

• Dependent

• Independent

• Random

What is the independent variable in an experiment?

• The thing you measure

• The thing you change

• The thing that remains the same

What is the dependent variable in an experiment?

• The thing you change

• The thing you measure

• The thing that remains the same

What are controlled variables in an experiment?

• The thing you change

• The thing you measure

• Any other variable that remains the same

In the investigation 'which type of soil makes the plant grow the fastest', what is the independent variable?

• soil

• amount of water

• type of plant

• amount of sunlight

In the investigation 'which type of soil makes the plant grow the fastest', what is the dependent variable?

• Plant growth

• Type of soil

• Amount of sunlight

• Amount of water

In the investigation 'which type of soil makes the plant grow the fastest', which of the following is a controlled variable?

• A) Type of soil

• B) Plant growth

• C) Amount of water each test gets

• D) None of the above

Identify the independent, dependent, and controlled variables in the experiment: Investigate what type of ball rolls furthest down a ramp.

• Independent variable: type of ball; Dependent variable: distance rolled; Controlled variables: ramp, surface, starting point

• Independent variable: ramp height; Dependent variable: type of ball; Controlled variables: distance rolled, surface

• Independent variable: distance rolled; Dependent variable: type of ball; Controlled variables: ramp, surface

• Independent variable: surface type; Dependent variable: ramp height; Controlled variables: type of ball, distance rolled