Across
- 2. made of 4 systems, atmosphere, biosphere, geosphere, and hydrosphere
- 8. resources that are replenished at the same rate of its usage
- 11. air
- 13. energy sources that is not within Earth's system
- 15. used by humans for survival and to improve the quality of their lives
- 16. wood burned for energy as heat and light
Down
- 1. resources that aren't replenished at the same rate of its usage
- 2. natural resources people use for energy
- 3. Natural Resources humans use to make objects or to eat as food
- 4. rocks, minerals
- 5. living things
- 6. water
- 7. atoms of uranium are split apart to release energy
- 9. cannot be created or destroyed
- 10. release energy when they are burned, nonrenewable
- 12. energy from the sun is absorbed and converted to electrical energy
- 14. A windmill uses moving air to turn the blades of a turbine and generate electrical energy