Across
- 3. A very young form of an insect (6)
- 4. A force that opposes motion (8)
- 7. H2O is known as (5)
- 9. A solid state of water (3)
- 10. Human or animal foot (4)
- 11. Organ that helps you breathe (4)
- 12. An instrument to see very small objects (10)
- 14. Smallest particle of an element (4)
- 15. The path Earth takes around the sun (6)
- 16. Change from liquid to gas (9)
- 18. The phase of the moon when it is completely dark (4)
Down
- 1. Organ in the body responsible for pumping blood (5)
- 2. Liquid that falls from the sky (4)
- 5. Energy from the sun (9)
- 6. The process plants use to make food (14)
- 8. A scientist who studies living things (9)
- 12. The natural satellite of the Earth (4)
- 13. The star at the center of our solar system (3)
- 17. A celestial body that orbits a star (6)