Crafting Hypotheses with Variables

What is the primary purpose of a hypothesis in a scientific investigation?

• To summarize the results of the experiment

• To outline what you think will happen in the experiment

• To list the materials needed for the experiment

• To describe the procedure of the experiment

Which format is recommended for phrasing a hypothesis in science?

• If-Then-Because

• When-Then-Because

• When-Then-Why

• If-Then-Why

In the balloon rocket experiment, what is the independent variable?

• The type of string used

• The number of puffs in the balloon

• The distance the balloon rocket travels

• The size of the balloon

Tags

NGSS.MS-PS2-2

What do we measure as the dependent variable in the balloon rocket experiment?

• The length of the string

• The distance the balloon rocket travels

• The type of balloon used

• The number of puffs in the balloon

How do we start constructing a hypothesis using the 'if-then' format?

• By stating the conclusion first

• By stating the dependent variable first

• By stating the scientific reason first

• By stating the independent variable first

What is the next step after stating the independent variable in the 'if-then' format?

• Stating the hypothesis

• Stating the conclusion

• Stating the dependent variable

• Stating the scientific reason

What does the 'if' part of the hypothesis represent?

• The conclusion

• The dependent variable

• The independent variable

• The scientific reason

What does the 'then' part of the hypothesis represent?

• The scientific reason

• The dependent variable

• The conclusion

• The independent variable

Complete the hypothesis: 'If we increase the number of puffs, then the distance the balloon rocket travels will increase because...'

• the balloon gets bigger

• the string gets longer

• the forward thrust force increases with each extra breath

• the air pressure decreases

Why is it important to include a scientific reason in the hypothesis?

• To make the experiment more complex

• To confuse the reader

• To show understanding of the scientific principles involved

• To make the hypothesis longer

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4