1. When a substance combines with oxygen.
2. The capacity to do work.
3. This is formed from burning.
4. This is a food product that contains energy.
5. A gas formed from energy being released in cells.
6. A molecule that contains energy.
7. Another molecule that contains energy.
8. Released as a result of respiration.
9. These organisms need to eat food to survive.
10. Energy is stored in this.
11. These living things can make their own food from sunlight.