Across
- 6. This planet is closest to the sun.
- 8. All forces have speed and __________.
- 9. The only planet known to have life.
- 11. Measures sound waves.
- 13. Known for it's 'rings'.
- 15. A push or a pull.
- 16. Discovered the 3 laws of motion.
Down
- 1. Genius
- 2. The largest planet.
- 3. Sound is caused by ____________.
- 4. This planet is farthest from the sun.
- 5. The reflection of sound waves off of a hard surface.
- 7. The number of planets in our solar system.
- 10. A measure of a sound's volume.
- 12. Fear of heights
- 13. The only star in our Solar System.
- 14. Two surfaces rubbing against each other.