Across
- 2. energy in food and battery
- 5. from trees, which grow
- 7. fermented from plant material, which grows
- 8. methane produced from things which grow
- 9. energy from bulbs and torches
- 11. energy in a moving body
Down
- 1. from animals that eat food, which grows
- 3. from wood that is partially burned in a limited air supply
- 4. formed from forests for 300 million years ago
- 6. energy in stretched materials
- 8. make produce heat
- 10. energy for burning material