Across
- 3. cannot be identified easily
- 4. most people use this
- 9. a nonrenewable source of energy; that is spilled the most
- 10. can only be used once; not a unlimited supply
- 12. can be used to store energy
Down
- 1. the most used source of energy
- 2. most areas use this to provide electricity
- 5. old trains are powered by this
- 6. can easily be identified
- 7. can be used many times; unlimited supply
- 8. solar panels are powered by this
- 11. where hot air and cold air collide