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Seventh Grade (Grade 7) Chemistry Questions

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Grade 7 :: Reactions by LHenry
What is produced as a candle burns?
  1. carbon dioxide
  2. water vapor
  3. both of the above
Grade 7 :: Acids and Bases by Stodola
Grade 7 :: Atomic Structure by cno243
A neutral atom becomes a positive ion when it
  1. gains an electron.
  2. gains a proton.
  3. loses an electron.
  4. loses a proton.
Grade 7 :: Acids and Bases by polinakapona
Strong acids have a pH scale of
  1. 0 - 7
  2. 6 - 8
  3. 11 - 15
  4. 0 - 4
Grade 7 :: Molecules and Compounds by cno243
A molecule of sugar contains carbon and
  1. hydrogen.
  2. oxygen.
  3. sodium.
  4. hydrogen and oxygen.
Grade 7 :: Bonds and Mixing by cno243
In a mixture, substances
  1. keep their own properties.
  2. have a definite chemical composition.
  3. lose their original properties.
  4. combine chemically.
Grade 7 :: Acids and Bases by RebeccaK
Grade 7 :: Properties of Matter by mrsbateacher
Mrs. B sets up two beakers that contain the same amount of water. She has two blocks of different materials that she labels "A" and "B." She places one block in each beaker. Block A sinks and Block B floats. Why?
  1. Block A has a lower density than the water.
  2. Block B has a higher density than Block A.
  3. Block A has a higher density than the water.
  4. Block A has a density equal to Block B.
Grade 7 :: Acids and Bases by loridickson
Which has the most acidic pH?
  1. 2.5
  2. 3.5
  3. 4.5
  4. 5.5
  5. 6.5
Grade 7 :: Molecules and Compounds by PMISIAS
Which of the following choices sequences the parts of matter from smallest to largest correctly?
  1. atom -> element -> compound
  2. atom -> compound -> element
  3. element -> atom -> compound
  4. element -> compound -> atom
Grade 7 :: Bonds and Mixing by cno243
Carbon atoms can join other atoms in a
  1. double bond.
  2. triple bond.
  3. single bond.
  4. single, double, or triple bond.
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