Across
- 2. Force that pulls objects down (5)
- 6. Scientist who studied gravity (6)
- 7. Water cycle process (7)
- 8. Scientific tool (8)
- 9. Type of rock formed from lava (6)
- 11. Process plants make food (9)
- 13. Scientific method step (6)
- 15. Simple machine (4)
- 16. Human skeleton part (5)
- 18. Fossil fuel (5)
- 19. Human body system (6)
- 20. Basic unit of life (4)
Down
- 1. Weather phenomenon (7)
- 3. Ecosystem component (5)
- 4. Atmosphere layer (6)
- 5. Animal's home (5)
- 10. Plant part that absorbs water (5)
- 12. Natural disaster (7)
- 14. Planet we live on (5)
- 17. Type of energy from sunlight (6)