Across
- 3. Short for natural gas; used to heat homes and cook food.
- 6. Something we use from the Earth, like water or oil.
- 8. Energy that comes from the sun.
- 11. Moving air that can be used to create energy.
- 12. A natural resource used to make electricity, especially in dams.
- 15. Harmful stuff in the air, water, or land.
- 17. Good for the environment and does not cause harm.
- 18. Energy made from plants or other once-living things.
- 19. Material burned or used to make energy.
- 20. The ability to do work or make things move.
- 23. Energy used to make machines and lights work.
- 24. Remains of old plants and animals; also used in "fossil fuels."
- 25. gas A gas found underground, often used for heating and cooking.
- 27. A type of fuel made from oil, used in trucks and buses.
- 28. Something that can be used up and is not unlimited.
Down
- 1. Energy that comes from heat deep inside the Earth.
- 2. A chemical found in all living things and in fuels; too much can hurt the planet.
- 4. Something that can be used without running out or hurting the Earth.
- 5. A machine with blades that spins to make electricity.
- 7. The natural world around us, like air, water, and land.
- 9. Light and heat from the sun that can be turned into electricity.
- 10. A natural liquid found underground, used to make fuels.
- 13. A resource that can run out and takes millions of years to form.
- 14. The usual weather in a place over a long time.
- 16. Energy made by moving water, like from rivers or waterfalls.
- 21. A black rock burned for energy; it comes from ancient plants.
- 22. A metal used in nuclear power to make electricity.
- 26. A thick liquid from the ground used for fuel and products like gasoline.