Experimental Design

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

• dependent variable
• independent variable
• control variable
• control group

Should experiments be repeated over and over to see if the results are the same each time?

• yes
• no

Tags

NGSS.HS-PS4-4

Mr. S. sets up an experiment to see how toy cars with different masses affects the distance they roll down a ramp.  Identify the independent variable.

• distance traveled by the cars
• height of the ramp
• mass of the car
• number of cars

Tags

NGSS.MS-PS2-2

Mr. S. sets up an experiment to see how toy cars with different masses affects the distance they roll down a ramp.  Identify a control variable.

• distance traveled by the cars
• height of the ramp
• mass of the car

Mr. S. sets up an experiment to see how toy cars with different masses affects the distance they roll down a ramp.  Identify the dependent variable.

• height of the ramp
•  distance traveled by the cars
• mass of the car
• number of cars

Which variable depends on what is done at the beginning of an experiment?

• Dependent
• Independent
• Control
• Following

A student is planning an experiment to find out how the height from which he drops a ball affects how high the ball bounces. The dependent variable is the _____.

• Diameter of the ball
• Force acting on the ball
• Height that the ball bounces
• Height from which the ball is dropped

Tags

CCSS.6.EE.C.9

A student is planning an experiment to find out how the height from which he drops a ball affects how high the ball bounces. A control variable is the _____.

• mass of the ball

• height that the ball bounces

• height from which the ball is dropped

What is the purpose of a control group in an experiment?

• To provide a standard for comparison

• To introduce new variables

• To ensure the experiment is biased

• To change the outcome of the experiment

In an experiment, what is the term for the variable that is kept constant?

• Dependent variable

• Independent variable

• Control variable

• Experimental variable