An experiment is controlled if you

• change multiple variables in the experiment

• change one thing at a time

Tags

NGSS.MS-PS2-2

Does playing video games improve reaction time after playing?

What is the independent variable?

• playing video games

• reaction time

• type of video game

Does playing video games improve reaction time after playing ?

Which of the following variables should be controlled/kept constant?

• playing video games

• reaction time

• time spent playing the video game

How does the amount of fertilizer affect the height of a plant? The independent variable is

• the height of the plant

• the amount of fertilizer

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

An experiment is performed on tomato plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil and sunlight. In this investigation, the independent variable is ...

• The type of plant

• The amount of sunlight

• The type of music

• The type of liquid

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

An experiment is performed on tomato plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil and sunlight. In this investigation, what are the controlled variables?

• Type of plant

• Water, apple juice, milk

• Plant growth

• Amount of soil

• Amount of sunlight

Tags

NGSS.MS-ETS1-1

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, what is the dependent variable?

• Type of plant

• Water, apple juice, milk

• Plant growth

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Mrs. Hohenstein uses a new spray cleaner to remove green slime left by students on the lab tables. Identify the dependent variable

• type of cleaner

• the new cleaner

• the old cleaner

• the effect of the cleaners

Mrs. Hohenstein uses a new spray cleaner to remove the green slime left by students on the tables. Identify the control group

• type of cleaner

• test with a new cleaner

• test with the old cleaner

• the green slime

Mrs. Hohenstein uses a new spray cleaner to remove the green slime left by students on the tables. Identify the independent variable.

• type of cleaner

• the new cleaner

• the green slime

• the effect of the cleaner