Solid, Liquid and Gas Crossword

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Across
  1. 5. A substance that can break down metals, change substances different colors or making fizzing noises.
  2. 8. When someone wants to test a theory or guess by using various scientific supplies.
  3. 9. A coin that is small and has a copper color to it.
  4. 10. When a liquid changes colors when it identifies an acid.
Down
  1. 1. When oxygen starts to change the surface of an object.
  2. 2. A person who studied mixing substances to see what would happen.
  3. 3. Particles are moving fast and want to spread out.
  4. 4. Has a definite shape.
  5. 6. When substances are mixed together and you can see or hear what happened.
  6. 7. Particles that move a little.