Knowledge Check Lesson 1.2

The type of variable that is measured by the outcome of an experiment is called ______ variable.

Your doctor takes your temperature. This is an example of him checking your______?

• Vital signs

• How popular you are

• independent variable

• hypothesis

Which of the following is an example of a dependent variable?

• The time of day when an experiment is conducted.

• The amount of water you drink before and experiment

• Your heart rate after running

• The type of shoes you wear before running

The type of variable that is changed at the beginning of an experiment to change the outcome is called the ______ variable.

Why is it important to clearly define the independent and dependent variables before starting an experiment?

• To ensure the experiment is valid and the results are reliable.

• To make the experiment more complex.

• To use more equipment in the experiment.

• To make the hypothesis more interesting.

If I floss more, then I will have fewer cavities. What is the independent variable?

• Number of cavities

• Amount of flossing

• Type of floss used

• Amount of brushing

_________ can increase your heart rate, your respiratory rate, and your blood pressure.

• Gamer rage, spicy food, and running

• Sleep, Drinking water, and relaxing

• Watching movies, walking around the house, and relaxing

• Exercise, stress, and anxiety

• What can patient signs and symptoms tell us about what’s happening in the human body?