Identifying Independent/Dependent Variables

What is the definition of an independent variable?

• The one that is changed by the scientist
• Is observed to see how it responds to the change made to the independent variable
• are quantities that a scientist wants to remain constant

What effect does high temperature have on radish germination increase. Which is the independent variable

• radish germination increase
• high temperature and radish germination increase
• high temperature

What effect does studying with music have on students test scores. What is the dependent variable?

• studying with music
• students test scores

What effect does smiling have on a teacher giving homework. What is the independent variable?

• her smiling
• teacher giving no homework

What effect does the light have on plant growth. What is the dependent variable?

• plant growth
• light

What effect does the light have on plant growth? What is the dependent variable?

• plant growth
• light

Spending time with a cat or dog decreases the amount of stress someone is feeling and allows them to perform better on tests. What is the dependent variable?

• Time spent with the dog or cat.
• Test grades 

Eating breakfast in the morning increases the ability to learn in school. What is the independent variable?

• Eating breakfast 
• Ability to learn

Workers at a company were assigned to one of two conditions: One group completed a stress management training program; another group of workers did not participate in the training. The number of sick days taken by these workers was examined for the two subsequent months? What is the dependent variable

• Number of sick days taken
• Stress management training program