Across
- 4. Which planet has the most stars
- 5. The study of the universe
- 8. Sound and light travel in ______
- 10. What is the bottom of a Compressional wave
- 11. What wave has sound energy
- 12. What is a third-class lever
Down
- 1. What type of electricity is lightning
- 2. What is an example second-class
- 3. What is the top of a Compressional wave
- 6. What huge clump of gas creates stars
- 7. What wave has light energy
- 9. What type of galaxy is the Milky Way
- 13. What is an example of a first-class lever