G7 - Understanding Variables

What is the independent variable in the running experiment?

• The runner's speed.

• The type of shoes worn.

• The distance of the run.

• The weather conditions.

What is the dependent variable in the running experiment?

• The type of shoes worn.

• The runner's clothing.

• The time taken to run 100 meters.

• The running surface.

Why is it important to keep controlled variables constant in an experiment?

• To make the experiment more challenging.

• To ensure the independent variable is the only factor affecting the dependent variable.

• To speed up the experimental process.

• To make the results look more impressive.

Which of the following is NOT a controlled variable in the running experiment?

• The weather.

• The runner's clothing.

• The type of shoes worn.

• The running surface.

In an experiment testing how different amounts of fertilizer affect plant growth, what would be the independent variable?

• The height of the plant.

• The type of soil.

• The amount of fertilizer.

• The amount of water given to the plant.

Find the Dependent Variable: You experiment to see if a bouncy ball or a tennis ball bounces higher.

• 
  Type of ball

• Drop height

• Height of bounce

• Surface the ball is bouncing on

Find the Independent Variable: You experiment to see if a bouncy ball or a tennis ball bounces higher

• 
  Type of ball

• Drop Height

• Height of Bounce

• Surface the ball is bouncing on

Find one controlled variable: You experiment to see how the noise level in a room affects your ability to memorize random numbers and letters.

• 
  Ability to memorize

• Age of person

• Noise level in room

• Amount of sleep