Experimental Design

Steve wanted to see if the type of fertilizer made sunflowers grow larger. What is the dependent variable 

• Type of fertilizer

• Size of sunflower

• Type of sunflower

Steve wanted to see if the type of fertilizer made sunflowers grow larger. What is the independent variable 

• Type of fertilizer

• Size of sunflower

• type of sun flower

Molly investigated if the age of students caused them to be better drivers. What is the independent variable?

• Type of car

• Skill of driving

• Age of student

Molly investigated if the age of students caused them to be better drivers. What is the dependent variable?

• Type of car

• Skill of driving

• Age of student

Sam wanted to know if the color of the chair you sat in when taking a test affected your test grade. What is the dependent variable.

• Color or chair

• Grade on test

• Age of students

This variable in an experiment is the one being deliberately changed by the scientist. 

• dependent variable

• independent variable

• data

• control group

The part of the experiment that remains the same for the control and experimental group.

• constants

• control

• independent

• dependent

When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the fertilizer?

• Dependent

• Independent

• Control

• Compound

The higher the temperature of water, the faster the egg will cook.  Select the independent variable.

• Faster Egg Cooks

• Higher Temperature

Carey and Justin are raising money to purchase books for the library. The more money they raise, the more books they will be able to purchase for the library.

Which of the variables is dependent?

• amount of money raised

• number of books