Across
- 2. renewable energy indirectly from the sun and is created by unequal heating of the Earth
- 4. type of rock that forms from cooling and hardening of magma or lava
- 5. solid, natural, inorganic, crystals, chemical composition (SNICC)
- 7. type of rock that forms under extreme heat and pressure
- 13. a resource that can be replaced quickly after it is used by people
- 16. type of precipitation that contains pollution
- 18. another name for nonrenewable energy sources
- 19. a type of conservation that involves reusing materials such as paper and plastic
- 20. solid fossil fuel that comes from swamp plants
Down
- 1. a resource that takes millions of years to form again after it is used by people
- 3. type of rock that forms from compacting and cementing of sediments
- 6. a type of air pollution that contains smoke and looks like fog
- 8. all the processes that change rocks from one type to another over time organized into a chart
- 9. renewable energy directly from the sun and is the original energy source for Earth
- 10. a major disadvantage associated with renewable energy
- 11. renewable energy that comes from heat within the Earth
- 12. gas fossil fuel that comes from sea organisms
- 14. renewable energy that comes from plants and animals
- 15. liquid fossil fuel that comes from sea organisms
- 17. composed of minerals and sometimes organic materials