Constants and Control Groups

Ms. DiGeronimo wanted to see how different types of music affected students' pulse rates. She played different types of music: heavy metal, rap, R&B, alternative, pop, country, and classical music. Identify the independent variable.

• classical music resulted in the highest pulse rate

• high pulse rate

• pulse rate

• types of music

Ms. DiGeronimo wanted to see how different types of music affected students' pulse rates. She played different types of music: heavy metal, rap, R&B, alternative, pop, country, and classical music. What constant should be considered when doing this experiment?

• types of music

• use all dead people

• using a different student for each music type

• amount of time the music was played

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.SP.B.5B

A group that receives (or is exposed to) the independent variable during an experiment.

• dependent variable

• experimental groups

• constants

• control groups

A group under normal conditions that is used for comparison in an experiment

• dependent variable

• experimental groups

• constants

• control groups

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

• dependent variable

• independent variable

• constants

• control group

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 are the constants for this experiment?

• growth of plant and water

• type of plant, light, and water

• type of fertilizer and growth of plant

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

Tags

NGSS.3-5-ETS1-3

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-ETS1-4

Which of the following terms refers to factors that remain the same in all groups?

• Constants
• Dependent variables
• Exemplars
• Independent variables