Across
- 2. made from burning things that were once alive
- 4. liquid black fuel used for transportation
- 5. generated by wind
- 8. a metal made up of iron and carbon
- 14. a resource that can be naturally replenished in a short period of time
- 15. a silvery-white element that doesnt rust, is the worlds most abundant metal, and is recycable
Down
- 1. a resource that takes millions of years to be replenished naturally
- 3. a thin layer in the earth used to plant crops and other plants
- 6. comes from the nucleus of an atom
- 7. boiling water is the source
- 9. cleanest burning fossil fuel
- 10. caused by flowing water
- 11. generates from the sun
- 12. solid black substance used for electricity
- 13. tall plant with woody tissue that gives off oxygen