Chemistry Review
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Review for 7th grade chemistry test.
- 1.
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- A.
Wood can be burned in a fireplace.
- B.
Wood is a solid that will float on water.
- C.
The bark is a darker color than the inside.
- D.
Wood can be chopped into smaller pieces.
- 2.
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- A.
Making ice cubes
- B.
Toasting bread
- C.
Slicing a carrot
- D.
Boiling water
- 3.
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Dissolving sugar into sweet tea is an example of a- A.
Chemical change
- B.
Physical change
- C.
State of matter change
- D.
Energy change
- 4.
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Which property of matter stays the same during both physical and chemical changes?- A.
Density
- B.
State of matter
- C.
Mass
- D.
Color
- 5.
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- A.
Pouring vinegar onto baking soda
- B.
Dropping an antacid into water
- C.
Heating water to boiling
- D.
Dropping Mentos into Diet Coke
- 6.
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O2 + 2H2 --> 2H2OIn this equation, the O2 is a- A.
Reactant
- B.
Product
- C.
Mixture
- D.
Solution
- 7.
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Which statement is true about acids?- A.
Acids turn litmus paper blue.
- B.
Acids are slippery and taste bitter.
- C.
All acids can harm you.
- D.
Acids have a pH below 7.
- 8.
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Common examples of bases include- A.
Lemons, vinegar and bleach
- B.
Soap, ammonia and sodas
- C.
Detergent, antacids and shampoo
- D.
Oranges, tomatoes, and digestive juices
- 9.
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If a substance turns blue litmus paper red, and does not change red litmus paper, it is- A.
An acid
- B.
A base
- C.
Neutral
- D.
It is not possible to determine
- 10.
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Predict the pH of lye, a strong base used in oven cleaners.- A.
2
- B.
6
- C.
8
- D.
13
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