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