Across
- 6. the planet we live on
- 7. a kind of fossil fuel
- 9. a kind of energy where it is not sustainable; there is a limited amount of it, it's hard to find, expensive, and harmful
- 11. a source of energy made from things that would otherwise be thrown away
- 12. energy made from panels that absorb rays from the sun
Down
- 1. harmful chemicals trapped in the atmosphere, such as carbon dioxide
- 2. the effect fossil fuels and greenhouse gasses has on the earth that is heating and polluting it
- 3. a form of electricity made from running water
- 4. a form of energy that takes heat from down inside the earth
- 5. an energy where turbines are used to create electricity
- 8. the machine used to turn wind into energy
- 10. a kind of energy that is always available, easy to find, and cheap