Science

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Across
  1. 4. The smallest unit of matter.
  2. 8. The process of a liquid changing into a gas.
  3. 10. A community of living organisms and their non-living environment.
  4. 12. A substance made up of two or more elements chemically combined.
  5. 13. The basic unit of life.
  6. 14. A pure substance made up of only one type of atom.
Down
  1. 1. A combination of substances that are not chemically combined.
  2. 2. The process by which plants use sunlight to create food.
  3. 3. A force that opposes motion between two surfaces.
  4. 5. The ability to do work.
  5. 6. The force that attracts objects towards the Earth.
  6. 7. The process of soil being worn away by wind or water.
  7. 9. A push or pull on an object.
  8. 11. A complete path for electric current to flow through.
  9. 13. reaction: A process where one substance changes into another.