Independent, Dependent, and Controlled Variables

Dependent Variable is the __________. It is what happens as a result of the independent variable.

• cause 因

• effect 果

A __________ variable 控制變數 is one which the researcher holds constant (controls) during an experiment.

• independent

• dependent

• controlled

Tags

NGSS.MS-PS2-2

Angel sets up an experiment to see how the height of the ramp affects the speed of a ball rolling down a ramp. Identify the independent variable 自變項 .

• The height of the ramp

• The speed of the ball rolling down the ramp

• The same ball should be used to roll down the slope each time.

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-4

Angel sets up an experiment to see how the height of the ramp affects the speed of a ball rolling down a ramp. Identify the dependent variable 應變項 .

• The height of the ramp

• The speed of the ball rolling down the ramp

• The same ball should be used to roll down the slope each time.

Tags

NGSS.MS-PS3-1

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.

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.

• Wrapping the phones in foil

• Independant Variable

• Number of dropped calls

• Dependent Variable

• 3 calls made without aluminum foil.

• Control

Tags

NGSS.MS-ETS1-3

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

What is being kept constant?

• ramp height

• speed of the ball rolling

• type of ball

Tags

NGSS.MS-PS2-2

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

Angel sets up an experiment to see how the height of the ramp affects the speed of a ball rolling down a ramp. Identify the controlled variables 控制變數.

• The height of the ramp

• The speed of the ball rolling down the ramp

• The same ball on the same ramp should be used to roll down the slope each time.