Question

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Question 14

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Question 14

Anita was using steel to make rusted sculptures. After building each sculpture, she caused the steel in the sculpture to rust by placing it into a tub filled

with salt water for eight hours. Anita wondered if steel would rust faster submerged in vinegar instead of salt water. To find out, Anita cut ten squares of

steel sheet metal and split them into two equal groups. She put one group of squares into a tub filled with salt water and the other group of squares

into a tub filled with vinegar. Once an hour for eight hours, Anita counted the number of rusted steel squares in each group.

What is the manipulated/independent variable in Anita's experiment?

A

number of rusted squares

B

time left in the liquid

ООО

С

the number of metal squares

D

the type of liquid the squares were placed in

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Answer 1

Answer: D. the type of liquid the squares were placed in

Step-by-step explanation:

An independent variable is required to be changed in an experiment which can observe the changes in the dependent variable, which is the outcome of the experiment.

The type of liquid used to rust the steel squares is the independent variable of the experiment and dependent variable is the rust on steel.