Chemical vs. Physical Changes

A change in the shape of an object is an example of _________________.

• a chemical change

• energy

• an endothermic change

• a physical change

Which of the following is an example of a chemical change?

• painting a house

• rusting of a bicycle

• washing a dog

• tearing up a newpaper

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which one shows that a chemical reaction has occurred?

• formation of a gas

• dissolving

• melting

• bending

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NGSS.MS-PS1-2

Which of the following IS a physical change?

• getting a haircut

• sour milk

• rusty metal

• a compound

What type of change occurs when a new substance is formed that has different properties from the original substances?

• chemical change

• physical change

• nuclear change

• mutation

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

a copper penny turning greenish after a few years.

• physical change

• chemical change

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NGSS.MS-PS1-2

In a ___________change, a substance changes into a different substance.

• physical change

• chemical change

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NGSS.MS-PS1-5

What is the BEST definition of a chemical reaction?

• A change in matter that produces one or more NEW substances.

• When two things combine and EXPLODE.

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

In a chemical reaction, no new atoms are created, and no atoms are destroyed. 

• true

• false

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NGSS.MS-PS1-5

A chemical change is different than a physical change because in a chemical change

• chemicals are used

• molecules do not physically touch

• a new substance is formed and in a physical change no new substance is formed

• the change can be seen but in a physical change it cannot

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NGSS.MS-PS1-1