Across
- 2. We hear this when something vibrates
- 4. Powers lights and gadgets
- 9. Helps us see, travels in waves
- 13. Mountain that erupts with lava
- 15. A test to learn something new
- 16. Object that attracts iron
- 17. Substance that can react or change
- 18. State of matter like air
- 20. Tool to look at tiny things
Down
- 1. Earth is one of these
- 3. Prehistoric animal scientists study
- 5. State of matter like water
- 6. Machine that can do tasks
- 7. Smallest building block of matter
- 8. Anything that takes up space
- 10. Tool to look at stars
- 11. Someone who creates new things
- 12. Needed to move or change things
- 14. Force that pulls things down
- 19. State of matter like ice