Across
- 9. organism that eats other organisms to survive
- 11. all the Earth's living things
- 13. pigment in chloroplasts used to trap sunlight energy
- 14. third step in aerobic respiration
- 16. all the Earths rocks and soil
- 17. describes a situation in which oxygen in present
- 18. substances at the beginning of a chemical reaction
- 20. adenosine triphosphate, charged energy storage
Down
- 1. second step of photosynthesis
- 2. anything that takes up space
- 3. all the Earth's water
- 4. all the Earth's gasses
- 5. site of steps 2 and 3 of cellular respiration
- 6. substance made from a chemical reaction
- 7. process of using light energy to make glucose
- 8. organism that makes its own food
- 10. process of breaking down glucose to make ATP
- 12. describes a situation in which oxygen is not present
- 15. first step of photosynthesis
- 19. site of photosynthesis