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Laabri

Chemical Changes in Matter

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Last updated over 5 years ago
10 Nsɛmmisa
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1.

When liquids such as water or vinegar evaporate, they release a gas called _________________.

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2.

The green substance that sometimes forms on the surface of a penny is called _______________.

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3.

People can rub silver polish on their silverware so that it will not turn black or ________________.

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4.

When iron is exposed to air and moisture, a reddish substance called ___________begins to form,

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5.

When one kind of matter is changed into a different kind of matter, that is a __________________.

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6.

Chemical changes always involve_______________.

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7.

Some chemical changes can be harmful.

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8.

Some chemical changes can be helpful.

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9.

Describe what happens when sodium and chlorine combine?

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10.

How is a chemical change different from a physical change?