PS: Unit 5 Chapter 3

1. most commonly used source of energy for cooking and heating in most of the developing world
4. precipitation that brings corrosive components of air pollution back to Earth
8. process used by plants to convert solar energy to stored energy
9. a solid form of fossil fuel
11. the type of energy produced by renewable energy resources
12. source of energy dependent on the movement of water
13. liquid nonrenewable resource
16. the form of coal that has the most moisture and is often called 'brown coal'
17. the type of energy that comes from heat deep inside the Earth's crust
18. the part of the mechanism in the production of electricity where mechanical energy is converted to electrical energy
20. country that relies on geothermal energy
21. form of coal that results when lignite is put under extreme heat and pressure

1. the form of energy that relies on rapidly moving air currents
2. the type of resource that is constantly available or can be replaced over a relatively short period of time
3. the form of coal that is the hardest and produces the most energy
5. a source of energy formed from the buried remains of dead plants and animals
6. forms of energy that can be used up and are not easily replaced
7. hot spot where water and steam burst through the Earth's crust
9. fuel source formed when wood is buried and burnt at a low controlled temperature
10. form of energy dependent on kinetic energy found in the nucleus of atoms
14. the theory that states it takes millions of years for fossil fuels to form
15. a source of liquid petroleum that requires digging up large amounts of earth and separating out the oil
19. source of energy that uses plants and organic matter