photosynthesis

5. the powerhouses of cells
7. an item of choise
10. air and what we breathe
11. the main type of sugar in the blood and is the major source of energy for the body's cells
12. the first stage of photosynthesis
14. nature's way of reusing carbon atoms
15. to change from one thing to another

1. critical structures inside of plant cells
2. a living thing that breaks down dead plants, animals or waste
3. is a process in which one or more substances are converted to e different substances
4. a colorless,odorless gas found in our atmosphere
6. creating goods by themselves
8. the process by which organisms use oxygen to break down food molecules
9. the process that plants use to make food
13. that chemical substances that start a chemical reaction