1. 15.3 Energy Resources Pg
Notebook page 117

2. Nonrenewable Energy Resources
Exist in limited in quantities and once used cannot be replaced except over the course of millions of years
Nonrenewable resources include oil, natural gas, coal and uranium (fossil fuels)

3. Fossil fuels
Fossil fuels - formed underground from the remains of once-living organisms.
Are the majority of the world’s energy source
Are NOT found everywhere

4. Fossil Fuels The US provides: 2 % of the world’s oil supply
25% of the world’s coal supply
Good things
Relatively inexpensive
Usually readily available
Bad things
Their use creates pollution
We don’t have much in the US

5. Renewable Energy Resources
Resources that can be replaced in a relatively short time period of time
MOST originate directly or indirectly from the sun.
Renewable energy resources include hydroelectric, solar, geothermal, wind, biomass, and possibly in the future nuclear fusion.

6. Renewable Energy Resources
Include:
Hydroelectric
Solar
Geothermal
Wind
Biomass
Nuclear Fusion
(possibly in the future)

7. Hydroelectric Energy Energy obtained from flowing water
As water flows downhill, its GPE is converted into KE.
The KE is used to turn turbines connected to electric generators
Good things
Low cost to produce and lack of pollution
Some bad things
Use dams which blocks the flow of water and cause a variety of environmental problems
Hamper the run of fish upriver for spawning

8. Hydroelectric power plants
Some used as water flows naturally down hill
Some use dams to build and hold back the water to create energy

11. Sunlight converted into usable energy
Solar Energy
Sunlight converted into usable energy
Passive Solar: like light going through the window

12. Sun converted into electrical energy through solar cells
Active Solar:
Sun heats flat collection plates through which water flows, this water used for your water heater
Sun converted into electrical energy through solar cells

13. Does not pollute but not found everywhere
Geothermal Energy
Thermal energy found under the earth’s surface
Pump water underground to create steam which in turn moves the generators to produce electricity
Does not pollute but not found everywhere

15. Biomass Energy: Energy stored in living things
Use wood, corn stalks (the stuff thrown away), and convert into thermal energy
Use to create bio fuel - a high- energy alcohol fuel

16. Others
Hydrogen fuel cell: generates energy by reacting hydrogen with oxygen
Waste product would be water so it’s nonpolluting
Nuclear Fusion: still being worked on today but would probably produce little pollution or radioactive waste
Wind turbines: convert the kinetic energy in the horizontal movement of wind into rotational energy of the turbines rotator shaft. Rotational energy is then converted into electrical energy by an electric generator.
Clean and wind is everywhere but takes up a lot of space

17. Conserving Energy Resources
Energy resources can be conserved by reducing energy needs and increasing efficiency of energy use
Finding ways to use less energy or to use energy more efficiently is known as energy conservation
Energy Saving Decisions: turn off lights, carpool, change the light bulbs, etc.