Independent and Dependent Variables in Real World

In a scientific investigation, the factor that is deliberately manipulated.

• Variable

• Independent Variable

• Dependent Variable

• Control

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-4

In a scientific investigation, the factor that changes as a result of manipulation of one or more independent variables.

• Variable

• Independent Variable

• Dependent Variable

• Control

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-4

The variable changed and tested by the scientist in an experiment...

• controlled

• dependent

• independent

• both independent and dependent

The dependent variable ...

• changes because of the independent variable

• is changed by the scientist

• stays the same

• none of these answers is right

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.

• 3 calls made without aluminum foil.

• Independant Variable

• Number of dropped calls

• Dependent Variable

• Wrapping the phones in foil

• Control

Tags

NGSS.MS-ETS1-2

NGSS.MS-ETS1-3

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

Which of the following is a dependent variable in an experiment measuring the effect of fertilizer on plant height?

• Type of fertilizer used

• Amount of fertilizer used

• Height of the plants

• Type of plants used

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

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.

In an experiment to see how different liquids affect plant growth, what is the dependent variable?

• Type of liquid used

• Amount of liquid used

• Growth of the plants

• Type of plants used

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1