Across
- 4. PORTABLE GAS
- 6. ENERGY FROM THE SUN
- 8. ENERGY FROM PLANTS
- 9. ENERGY OF MOVING AIR
Down
- 1. HEAT ENEGY INSIDE THE EARTH
- 2. GAS MOVED IN PIPELINES
- 3. BLACK, SOLID FOSSIL FUEL
- 4. LIQUID FOSSIL FUEL
- 5. ENERGY IN FLOWING WATER
- 7. ATOM OF THIS ELEMENT CAN BE SPLIT