Across
- 3. energy from sunlight
- 4. fuel that is made from living matter
- 7. a liquid fossil fuel easily transported
- 8. oil obtained from the ground
- 10. resources that have unlimited supply
Down
- 1. to make smaller in size
- 2. natural resources limited in supply
- 5. hydrocarbon that is a fuel to generate energy
- 6. energy stored in moving objects
- 9. process of taking unwanted elements from oil