Env. Sci.: Scientific Variables

True or False: a test may have more than one independent variable

• true

• false

The variables in an experiment that stay the same are the -

• Independent Variable

• Dependent Variable

• Constants

• Control

A student wants to test the effects of type of exercise on heart rate.  What is the dependent variable?

• heart rate
• type of exercise
• amount of exercise
• time of day exercise occurs

How many variables can be tested in a controlled experiment?

• one
• two
• three
• as many as possible

Tags

NGSS.MS-PS2-2

Why do we want to test one variable at a time?

• Because it is hard to setup a data table with more
• To know what is causing the changes
• It is what has always been done
• No one really knows

Tags

NGSS.MS-PS2-2

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

NGSS.MS-PS3-5

Mr. S set 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

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

You drop a tennis ball from three different heights: 1 meter, 2 meters, and 3 meters above the ground. You measure to see how high the ball bounces.

What is a constant?

• The ball you use

• The height you drop the ball from

• The height the ball bounces

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

• dependent variable
• independent variable
• data
• control group

Tags

NGSS.MS-PS2-2

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

• Dependent
• Independent
• Control
• Following

Tags

NGSS.MS-PS3-4