Across
- 7. breaking down of bigger rocks into smaller ones
- 8. the process of sharing or spreading out of the natural resources
- 10. gases in the atmosphere trapping in the heat on Earth
- 13. flammable gas similar to petroleum, ex: propane, methane
- 17. materials that cannot be replaced once they are used up
- 18. materials around you that can be found in nature
- 19. processes that shape the Earth a long time ago is still going on today
- 20. materials that can be used repeatedly
Down
- 1. heat energy released from particles in motion, ex: geothermal
- 2. energy stored in atom bonding, ex: digestion
- 3. rise in temperature due to heat being trapped on Earth
- 4. processes that causes the Earth's surface to wear down
- 5. energy in moving objects
- 6. any substance made in a laboratory setting, ex: plastic bottle
- 9. using your resources sparingly so that they don't run out
- 11. type of fuel derived from living things, ex: gasoline, oil
- 12. liquid made of hydrocarbons buried deep underground that can be used for fuel
- 14. having the ability to do wok; measured as heat
- 15. valuable mineral that can be extracted from the Earth, ex: gold, zinc, copper
- 16. energy in non-moving objects; stored energy, ex: bow