Year 10 Chemistry

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Across
  1. 3. A substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
  2. 5. The continuous physical force exerted on or against an object by something in contact with it.
  3. 6. An apparent displacement or difference in the apparent position of an object viewed along two different lines of sight.
  4. 8. Precipitation is the formation of a solid in a solution or inside another solid during a chemical reaction or by diffusion in a solid.
  5. 10. The mass of an atom expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom.
  6. 12. A substance produced during a natural, chemical, or manufacturing process.
Down
  1. 1. A substance made by mixing other substances together.
  2. 2. A minute portion of matter.
  3. 4. A measure, quantity, or frequency, typically one measured against some other quantity or measure.
  4. 5. A table of the chemical elements arranged in order of atomic number.
  5. 7. A substance that takes part in and undergoes change during a reaction.
  6. 9. The degree or intensity of heat present in a substance or object.
  7. 11. The condition of being protected from or unlikely to cause danger, risk, or injury.