Scientific Variables & States of Matter Test Review

Shelly wants to know if the temperature of a tennis ball affects the height of the bounce. What is the independent variable?

• the brand of tennis ball

• the temperature of the tennis ball

• how high the ball bounces

• the surface the ball is bounced on

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Controlled variables are

• factors that are being measured

• factors that are being changed

• factors that are observed

• factors that stay the same

Which variable do you measure or observe in an experiment?

• constant variable

• controlled variable

• dependent variable

• independent variable

Tags

NGSS.MS-PS2-2

Taylor is investigating if different types of shoes affect how high an athlete can jump. What is the independent variable.

• how high the athletes jump

• how the jumps are measured

• different types of shoes worn

• the surface used for the jumps

Leslie is investigating which brand of cell phone has the longest battery life. What is the dependent variable?

• how the phone is used

• charge of the battery before starting

• the brand of cell phone

• how long the battery lasts

Isacc is investigating how long it take his dog to react to different sounds. What is the independent variable?

• dog reaction times

• different sounds the dog is exposed to

• how the dog reacts to different sounds

• how long Isacc make each different sound

Tags

NGSS.MS-LS1-8

Melissa is investigating how different types of music affect student heart rates. What is the controlled variable?

• the volume of the music

• the student heart rates

• the type of music played

• the radio station

A student constructs several terrariums to grow plants. Each terrarium is exposed to a different amount of sunlight each day. In order to determine the ideal amount of sunlight, which of the following variables must be held constant?

• growth rate

• amount of sunlight received

• type of plan

Tags

NGSS.MS-LS2-1

A student hypothesizes that green algae will grow fastest when exposed to blue light. To test this hypothesis, the student should design an experiment with which independent variable?

• color of light

• amount of light per day

• color of algae

Tags

NGSS.MS-LS1-5

Sandy is conducting an investigation to find out which food his dog likes best. Which is the dependent variable in his investigation?

• color of the dog's dish

• amount of food eaten

• the type of food given