dependent, independent and control variables

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

Aim: Does the type of gasoline put in a car effect how fast the car can drive. What is the independent variable?

• Type of gasoline
• which car the gas is put into
• how fast the car can drive
• how much gas is put into the car

Mr. S. sets up an experiment to see how the mass of a ball affects the distance it rolls off a ramp.  Identify the independent variable.

• distance traveled by the ball
• height of the ramp
• mass of the ball
• weight of the ball

Zach wants to know if the amount of time he spends on social media has an effect on his grades. What is the independent variable?

• Time on social media

• His grades

Which brand of paper towel will absorb the most liquid? What is the dependent variable?

• brand of paper towel

• amount of water absorbed

The variable that is being tested, counted or measured and is responding to the independent variable is known as:

• Control

• Independent Variable

• Dependent Variable

Jack is doing an experiment to see which shoes help him run the fastest. What will his independent variable be?

• The shoes he wears

• The track he runs on

• The time of day he runs

The independent Variable is:

• What you keep the same in the experiment

• What you change in an experiment

• What you measure in an experiment

This type of variable is what you DON'T change in a lab

• Control

• Independent

• Dependent

Ben makes five paper helicopters with different wing lengths. He drops them the same way from a height of two meters for five trials each. He records the amount of time it takes for each helicopter to fall to the ground.

What is the independent variable?

• Dropping the same way

• Wing Length

• Amount of time it takes the helicopter to hit the floor

• Dropping from the same height