6th review
Across
- 3. frozen water
- 4. found in the immune system
- 8. gas exchange
- 9. where planes fly
- 13. makes proteins
- 15. explains why
- 16. outer layer of a planet cell
- 17. variable that you change
- 18. where we live
- 19. break down food into nutrients
- 20. changes rapidly
Down
- 1. makes ATP energy
- 2. air
- 5. long period of time weather
- 6. repeating an experiment multiple times
- 7. responsible for movement
- 10. water
- 11. has meteors
- 12. holds the DNA
- 14. part of the nervous system