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Across
  1. 3. a substance or molecule that participates in a chemical reaction
  2. 4. A substance or molecule that forms in a chemical reaction.
  3. 6. a dissolved substance.
  4. 8. a dissolved substance
  5. 10. the basic unit of a chemical element.
  6. 11. reaction- A process that occurs when two or more molecule interact to form new molecules
  7. 15. water or the amount of water that falls to the earth as hail, mist, rain, sleet, or snow.
Down
  1. 1. Known as the "Middle life" around 252 to 66 million years ago.
  2. 2. the mostly solid bulk of Earth's interior.
  3. 5. a type of mixture involving two or more substances.
  4. 7. A chemical reaction that absorbs energy from it's enviorment
  5. 9. reaction- A chemical reaction that releases thermal energy.
  6. 12. The central or innermost portion of the Earth, lying below the mantle and probably consisting of iron and nickel.
  7. 13. two or more atoms connected by chemical bonds, which form the smallest unit of a substance that retains the composition and properties of that substance
  8. 14. any of the large bodies that revolve around the Sun in the solar system