Across
- 3. natural fuel formed from the remains of living things
- 4. a colourless gas that can do harm to life forms
- 5. is the innermost part of the Earth
- 6. A building that generates electricity
Down
- 1. the layers of gases that surround the Earth
- 2. Outer layer of the Earth
- 4. a zone of hot rock in the interior of the Earth located in between the outer crust and molten core