Across
- 4. the whole of space
- 5. broken rocks are moved
- 10. when it rains
- 13. mining waste
- 15. more than one simple machine
- 16. a portion of water saturating soil
- 17. describes chemicals dangerous to touch
- 19. mining above the surface
- 20. the study of animals
Down
- 1. a map of lines showing the field
- 2. the circulation of water on earth
- 3. to keep going for an indefinite time
- 6. an organism that lives in another organism
- 7. harmful chemicals in the environment
- 8. reusing old products
- 9. rocks broken down
- 11. a small particle that makes all things up
- 12. isn't alive
- 14. a force that keeps an object floating
- 18. a point which a lever turns