Across
- 2. — Energy with wavelengths longer than visible light (two words).
- 5. — Energy with wavelengths shorter than visible light (two words).
- 9. — Heat transfer by direct contact between particles.
- 12. — The ability to cause change.
- 14. — Process that traps heat in the atmosphere (two words).
- 18. — Energy sources formed from ancient plant and animal remains (two words).
- 19. — Energy stored due to position or chemical bonds (two words).
- 20. — Energy sources continually replenished naturally (two words).
- 21. — The process by which one thing soaks up another.
- 23. — Horizontal distance between two wave crests.
Down
- 1. — When a surface throws back light, heat, or sound.
- 3. — Energy due to motion of molecules (two words).
- 4. — Organic plant matter used as fuel (two words).
- 6. — Direct transfer of energy through empty space.
- 7. — Heat transfer through movement of a fluid.
- 8. — Energy source used faster than it's replaced (remove hyphen/space).
- 10. — Energy from the Earth's internal heat (two words).
- 11. — Electricity generated by water turning turbines (two words).
- 13. — Fuels like gasoline and kerosene made from fossil sources.
- 15. — Light that the human eye can detect (two words).
- 16. — Energy an object has because of its motion (two words).
- 17. — Energy that comes from the sun (two words).
- 22. — A fossil fuel made from marine organisms and algae.