Science

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Across
  1. 6. Force that pulls objects toward Earth
  2. 8. Two or more atoms bonded together
  3. 9. Force that resists motion between surfaces
  4. 10. tectonics Theory explaining movement of Earth’s plates
  5. 12. energy Energy of motion
  6. 14. Speed in a given direction
  7. 15. Substance present at the start of a reaction
  8. 17. The ability to do work
  9. 18. A push or pull on an object
  10. 19. Breakdown of rocks into smaller pieces
  11. 20. energy Stored energy
  12. 21. Substance formed from two or more elements chemically combined
Down
  1. 1. A disturbance that transfers energy
  2. 2. A pure substance made of one type of atom
  3. 3. Distance between waves
  4. 4. Substance formed in a reaction
  5. 5. The smallest unit of matter
  6. 7. Change in velocity over time
  7. 9. Number of waves passing a point in a given time
  8. 11. Change in position over time
  9. 13. reaction Process where substances change into new substances
  10. 16. Movement of sediment from one place to another