Across
- 4. changing into vapor
- 6. without a backbone
- 8. center of an atom
- 10. basic unit of life
- 12. Process of water falling from clouds
- 14. used to look at tiny objects
- 16. that pulls objects downward
- 17. process plants use to make food
Down
- 1. Group of stars forming a pattern
- 2. Animals that eat only plants
- 3. the red planet
- 5. Change from liquid to solid
- 7. rock melted beneath Earth’s surface
- 9. star in our solar system
- 11. planet we live on
- 13. Energy from moving electrons
- 15. gas humans breathe in