Across
- 1. Most pure substance, made of only one type of atom
- 2. Extra protection for plant cell
- 3. non-living ecological factor; air, water, sun
- 5. Cycles; water, nitrogen, and carbon
- 8. many food chains together
- 10. Smallest unit of life
- 12. Can only travel through a medium
- 18. Reaction that feels warm
- 19. every action has an equal/opposite reaction
- 20. Law that says cannot be created or destroyed
Down
- 1. radio, micro, infra, visible, UV, X-ray, gamma
- 4. Lunar phases getting larger each night
- 6. 12 subatomic particles in its nucleus
- 7. Contains DNA
- 9. Small in gamma Bigger in radio
- 11. Single cell prokaryote
- 13. Cell Respiration Reactant
- 14. non-contact force from moving electrons
- 15. Light/sound is taken in and held
- 16. a plant; an organism that makes its own
- 17. greater when closer/bigger