Across
- 2. two or more elements chemically combined
- 4. a change in speed
- 7. sum of all forces acting on an object
- 9. two or more opposite forces that do not cause a change in motion
- 10. tendency of objects to resist change in motion
- 12. unit for distance
- 16. equals the total number of protons and neutrons
- 17. tells you how many protons in an atom
- 19. the force of gravity acting on an object
- 20. the amount of space an object takes up
Down
- 1. a push or a pull
- 3. the electrons on the outermost shell
- 5. the amount of mass in a known volume of an object
- 6. speed and direction
- 8. a pure substance that cannot be broken down into simpler substances
- 11. unit for force
- 13. cause a change in motion, speed, or direction
- 14. rate at which a chemical substance undergoes a chemical reaction
- 15. distance traveled over a given time
- 18. unit for mass
- 21. amount of matter in an object