Practice Independent Dependent Constant Variables

The variable we are changing/investigating in an experiment is the:

• Dependent Variable

• Independent Variable

• Constant

Tags

NGSS.MS-PS2-2

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

What is the Independent Variable (IV) in the following testable question: Does the temperature of a tennis ball affect the height of its bounce?

• the temperature of tennis ball

• height of the bounce

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Mark notices he has dropped calls on his cell phone when he walks into his bedroom. His friend told him to try and wrap aluminum foil around his phone to get better signal. Mark talks on the phone 3 times while walking into his bedroom and drops 2 of the 3 calls. He wraps his phone in aluminum foil and talks on the phone 3 more times while walking into his bedroom. With the aluminum foil on his phone he only drops 1 phone call.

• Number of dropped calls

• Control

• Wrapping the phones in foil

• Dependent Variable

• 3 calls made without aluminum foil.

• Independant Variable

Ruthie has a pet goldfish. After several months the goldfish quits growing. Ruthie’s Mom told her the goldfish might have stopped growing because the tank is too small. Ruthie measures the size of her goldfish in its current tank, and then puts the goldfish in a larger tank. After 2 months the goldfish is now 1cm longer.

What is the Independent Variable?

• Length of the Goldfish

• Color of the Goldfish

• Size of the fish tank

• 2 months

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Heidi is a chocolate lover and eats chocolate daily. She has a bad break-out and her friend told her eating chocolate causes pimples. Heidi continues to eat chocolate every day for 2 weeks and counts the number of pimples she has on her face. The following 2 weeks she doesn’t eat any chocolate and counts the number of pimples on her face. What is the Independent Variable?

• 2 weeks NOT eating chocolate

• 2 weeks eating chocolate

• Number of pimples

• How much sleep Heidi gets.

Heidi is a chocolate lover and eats chocolate daily. She has a bad break-out and her friend told her eating chocolate causes pimples. Heidi continues to eat chocolate every day for 2 weeks and counts the number of pimples she has on her face. The following 2 weeks she doesn’t eat any chocolate and counts the number of pimples on her face. What is the Independent Variable?

• 2 weeks NOT eating chocolate

• 2 weeks eating chocolate

• Number of pimples

• How much sleep Heidi gets.

Tags

NGSS.MS-LS1-5

In the statement, Citronella leaf extract repels dengue-carrying mosquitoes, what is the independent variable?

• extract of citronella

• duration of the study

• repelling action of the extract

• dengue-carrying mosquitoes

Ruthie has a pet goldfish. After several months the goldfish quits growing. Ruthie’s Mom told her the goldfish might have stopped growing because the tank is too small. Ruthie measures the size of her goldfish in its current tank, and then puts the goldfish in a larger tank. After 2 months the goldfish is now 1cm longer. What is the Independent Variable?

• Length of the Goldfish

• Color of the Goldfish

• Size of the fish tank

• 2 months

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Mrs. G set up an experiment to see how the type of ball affects the distance it rolls off a ramp.  Identify the Independent Variable in this experiment.

• distance traveled by the ball

• height of the ramp

• the type of ball