Scientific Variables

In any experiment, the independent variable ______________.

• remains the same to not mess up the experiment

• is purposely changed to test the hypothesis

• is known by the scientist before doing the experiment

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

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

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

Tags

NGSS.MS-PS3-5

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

• dependent variable
• independent variable
• data
• control group

Which variable is the data that you measure and record in the lab?

• independent

• dependent

• control

• math

Tags

NGSS.MS-PS2-2

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid. Each plant has the same amount of sunlight, soil and listens to the same music. What is the independent variable?

• the type of plant

• the type of liquid

• the type of music

• the amount of liquid

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Which brand of bubblegum allows for your to blow the largest bubble?

• independent

• dependent

Does the temperature of the room affect student's test scores?

• independent

• dependent