Identify the independent variable: If I take an afternoon nap, then I will focus more.

Identify the dependent variable: If you drink energy drinks, then you will be more aggressive.

Identify the independent variable: If people spend more time on social media, then they read less books.

Identify the dependent variable: If you exercise more, then you will loose weight.

Identify the control variable: If you eat breakfast in the morning, then you will be more alert at school.

Identify the independent variable: Students watch a cartoon alone and then with a group. After each time they rate how funny the cartoon was.

Identify the dependent variable: Tammy watered one group of sunflowers with a salt water solution and another group of sunflowers with pure water. After 3 weeks she recorded the plants height.

Identify the independent variable: One tank of goldfish is fed the normal amount of food once a day, a second tank is fed twice a day, and a third tank is fed four times a day during a six week period. The fish's weight is recorded daily.

Identify the control variable: If the air temperature is warmer, then the crickets will chirp louder.

Which variable is purposely changed to test the hypothesis?

Which variable is what we want to see happen in the experiment?

Which is the variable that you want to keep the same in the experiment?

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