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Chemical Changes in Matter
By Laura Rideout
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Last updated about 5 years ago
10 questions
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Question 1
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Question 2
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Question 3
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Question 4
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Question 5
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Question 6
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Question 7
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Question 8
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Question 9
9.
Describe what happens when sodium and chlorine combine?
Question 10
10.
How is a chemical change different from a physical change?
When liquids such as water or vinegar evaporate, they release a gas called _________________.
rust
vapors
tarnish
The green substance that sometimes forms on the surface of a penny is called _______________.
copper acetate
slime
carbon
People can rub silver polish on their silverware so that it will not turn black or ________________.
tarnish
rust
crack
When iron is exposed to air and moisture, a reddish substance called ___________begins to form,
tarnish
rust
copper
When one kind of matter is changed into a different kind of matter, that is a __________________.
physical change
chemical change
compound
Chemical changes always involve_______________.
energy
water
metal
Some chemical changes can be harmful.
True
False
Some chemical changes can be helpful.
True
False