HypothesisTutorial

How should a hypothesis for a controlled experiment start?

I think

If

I predict

Correct • Always start a hypothesis with “If”

• Continue with your hypothesis.

Incorrect

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What comes after “If”?

the set up the experiment

the results of the experiment

the prediction of the experiment

Correct • After If, you describe the way you set up

the experiment.

If, there are two marshmallow peeps that are the same size and one is placed on the counter for 20 seconds and compared to the other that is heated in a microwave for 20 seconds…

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What comes after the description of the set up?

I predict that

I think that

then

Correct • “then” always follows the description of the

set up of the experiment.

Incorrect

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What comes after “then”?

a description of your procedure

a specific prediction of what the results will be (dependent variable)

a prediction of how you will work with your partner

Correct After “then” you write a specific prediction

of what the results will be (dependent variable).

If there are two marshmallow peeps that are the same size and one is placed on the counter for 20 seconds and compared to one heated in the microwave for 20 seconds, then the marshmallow on the counter will remain the same size and the marshmallow in the microwave will be doubled in size.

Incorrect

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What are the next sentences of a hypothesis about?

Nothing, you are finished.

The results of your experiment.

Support from life and science.

Correct You use support from science and life to support the prediction you made in your “then statement”.If there are two marshmallow peeps that start the same size and one placed on the counter for 20 seconds and compared to the other that is heated in a microwave for 20 seconds, then marshmallow on the counter will remain the same size and the marshmallow in the microwave will be doubled in size. Support from life is that marshmallows have air holes in them, and unheated air doesn’t change in size. Support from science is that when a gas is heated, it expands.

Incorrect

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TEST

1. On a separate piece of paper, write a complete hypothesis for the experiment described on the next slide.

2. Turn that paper in to your teacher for a grade.

Students have two identical balloons at room temperature. They have blown the balloons up to a circumference of 30 inches. They keep one at room temperature and place the second balloon in the refrigerator. How much will the balloons’ circumferences change in twenty minutes?

Write your hypothesis and turn it in.