Science

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Across
  1. 1. Non-living environmental factor
  2. 5. Gaseous layer around Earth
  3. 6. Positively charged particle
  4. 11. Resists motion
  5. 12. Genetic change
  6. 13. Testing a hypothesis
  7. 14. Amount of matter
Down
  1. 2. Earths outer layer
  2. 3. Simplified version of a system to explain or predict behavior
  3. 4. Plants making food
  4. 7. one type of atom
  5. 8. Law of motion
  6. 9. Makes own food
  7. 10. Liquid layer of Earth's Interior
  8. 15. pH less than 7