Across
- 2. A material that releases energy as heat when it burns
- 5. Stores chemical energy and can convert that energy into electrical energy
- 8. Heat energy obtained from beneath Earth's surface
- 9. A device that changes energy of motion into electrical energy
Down
- 1. The energy of moving water
- 2. Materials that formed as ancient plants and animals decayed underground
- 3. A device that spins as the gas flows and changes the heat energy of the steam into energy of motion
- 4. A pollutant that increases the atmosphere's ability to hold heat
- 6. The process of burning a fuel to produce heat and light
- 7. A harmful substance released during energy production