Observing Chemical Change

What are the ways that a chemical change can be observed?

• color change

• a solid may appear

• gas may be produced

• the shape changes

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NGSS.MS-PS1-2

A ________ property is the characteristic of a substance that describes it ability to change into other substances.

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NGSS.MS-PS1-2

To observe the chemical properties of a substance, what must you do?

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Answer explanation

You must change it into another substance

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NGSS.MS-PS1-2

What is an example of a chemical change?

• burning

• tarnishing

• rusting

• chopping

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

A chemical change happens when...

• a substance is changed at the atomic level 

• bonds are broken and formed 

• a new substance is made

• all of the above! 

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

A ​ (a)   change is where one or more new substances are created.

• chemical

• physical

• nuetral

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

When iron is exposed to water vapor and air, it rusts. This ia an example of a _______________ change

• Chemical

• Physical

• Both

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

A change in matter that produces one or more new substances is a _________ change, or a ________ reaction.

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Chemical changes occur when bonds break and new bonds form.

• true

• false

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

What are the two main kinds of changes that you can observe in chemical reactions?

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Answer explanation

Formations of new substances and changes in energy.

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NGSS.MS-PS1-2

NGSS.MS-PS1-5