Across
- 2. a material that contains energy
- 5. a form of energy that is warm
- 6. to change into something else
- 9. a form of energy that doesn't sit still
Down
- 1. the place where most of our energy comes from
- 3. a form of energy that you can see
- 4. the preserved remains of plants and animals that lived long ago
- 7. a stored energy source that keeps things alive
- 8. it makes things happen