Across
- 3. Energy that is generated by the heat of water and steam that is found deep underground
- 4. Is a natural resource that cannot be used up or it is one that can be replaced within a human life span
- 6. The long-term shifts in temperatures and weather patterns.
- 7. A chemical element that naturally occurs in all organic compounds and is found in all forms of life
- 8. Heat within the earth
- 10. A chemical reaction that produces heat and light
- 13. The amount of carbon dioxide released into the air because of your own energy needs
- 15. A process that occurs when gasses in Earth's atmosphere trap the Sun's heat
- 17. A chemical compound that is usually in the form of a gas
- 18. A natural substance formed from the buried remains of ancient organisms that can be used aenergyource of energ
- 19. Are natural materials that cannot be replaced after they are used
- 20. A very small pellet of plastic that serves as raw material in the manufacture of plastic products
Down
- 1. Something that is found in nature and can be used by people
- 2. Electricity generated by moving water
- 5. The increase in Earth's average temperature over a long period of time
- 9. The clearing or cutting down of forests
- 11. An organic material made from plants and animals (microorganisms).
- 12. It is light, heat, and other forms of energy given off by the Sun
- 14. Is an alternative energy source that is powered by air
- 16. Substances released into the air and are measured by their concentrations, or parts per million, in the atmosphere