Across
- 2. energy fromed by friction
- 6. energy that will run out
- 8. two steps before you get electricity
- 10. comes from the sun
Down
- 1. energy that never runs out
- 3. dug up from under the ground
- 4. what's at the to of mountains
- 5. heat that's built up
- 7. when you split atoms
- 9. falling water