Across
- 3. is an essential nutrient for animals and plants
- 4. end substances after a biological process has occurred
- 7. is the breaking down of sugar molecules into simpler compounds to produce substances that can be used in making chemical energy
- 9. is the process by which green plants and certain other organisms transform light energy into chemical energy
- 10. are organisms that can produce their own food using light, water, carbon dioxide, or other chemicals
- 13. generate most of the chemical energy needed to power the cell's biochemical reactions
- 15. is an organism that eats other plants or animals for energy and nutrients
- 16. the total amount of water on a planet
- 17. is widely distributed forming organic compounds when combined with hydrogen, oxygen, etc
- 18. is a mixture of gases that surrounds the Earth
- 19. plant cell organelles that convert light energy into relatively stable chemical energy via the photosynthetic process
Down
- 1. does not use oxygen to produce energy
- 2. organism that breaks down dead organic material
- 5. includes the rocks and minerals on Earth
- 6. is the process in which glucose is broken down to produce energy
- 8. is a naturally occurring element that is essential for growth and reproduction in both plants and animals
- 11. is the region of the earth that encompasses all living organisms: plants, animals, and bacteria
- 12. anything that takes up space and can be weighed
- 14. is a pigment present in all green plants and a few other organisms
- 20. Requiring air or oxygen for life or survival, used especially to refer to aerobic bacteria