09 10 energy sources carol
DESCRIPTION
TRANSCRIPT
![Page 1: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/1.jpg)
![Page 2: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/2.jpg)
Natural Resources
• A natural resource is a feature of Earth that benefits people.
• Earth’s natural material resources are things like air, fresh water, and soil.
![Page 3: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/3.jpg)
16.2 Electricity from fossil fuels• A nonrenewable resource is not replaced as
it is used.
• Because it takes so long for these resources to form, someday we will not have enough fossil fuels to produce the electricity we need.
• The three major fossil fuels are coal, oil, and natural gas.
Video clip on fossil fuels
![Page 4: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/4.jpg)
COAL, PETROLEUM, AND GASCoal, petroleum, and natural gas are
considered nonrenewable
because they can not be replenished in a
short period of time. These are called
fossil fuels. Video clip on fossil fuels
Video clip on reliance on fossil fuels
![Page 5: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/5.jpg)
HOW IS COAL MADE ???
![Page 6: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/6.jpg)
HOW ARE OIL AND GAS MADE ???
![Page 7: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/7.jpg)
Electricity from renewable resources (often called alternative energy sources)
• A renewable resource can be replaced naturally in a relatively short period of time.
• The Sun and wind are renewable resources that can be used as energy sources.
![Page 8: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/8.jpg)
Electricity from renewable resources
• It is also possible to use:
– moving water (hydroelectric)
– hot spots near Earth’s surface (geothermal)
– Energy from plant material (biomass)
– Let’s look at some of these!
![Page 9: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/9.jpg)
Energy released by fission (or fusion) reaction.
![Page 10: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/10.jpg)
![Page 11: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/11.jpg)
This is steam, not polluted air!
![Page 12: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/12.jpg)
Video clip on nuclear power
![Page 13: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/13.jpg)
•Nuclear power costs about the same as coal, so it's not expensive to make.
•Does not produce smoke or carbon dioxide, so it does not contribute to the greenhouse effect.
•Produces huge amounts of energy fromsmall amounts of fuel.
•Nuclear power is reliable.
![Page 14: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/14.jpg)
- Although not much waste is produced, it is very, very dangerous. It must be sealed up and buried for many years to the radioactivity to die away.
- Nuclear power is reliable, but a lot of money has to be spent on safety . If it does go wrong, a nuclear accident can be a major disaster.
![Page 15: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/15.jpg)
![Page 16: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/16.jpg)
![Page 17: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/17.jpg)
Buford Dam at Lake Lanier
![Page 18: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/18.jpg)
Buford Dam at Lake Lanier
![Page 19: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/19.jpg)
![Page 20: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/20.jpg)
Video clip on Hydroelectric power
![Page 21: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/21.jpg)
- Once the dam is built, the energy is free. - No waste or pollution produced.
- Much more reliable than wind, or solar power.
- Water can be stored above the dam ready to cope with peaks in demand.
- Electricity can be generated constantly.
![Page 22: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/22.jpg)
-The dams are very expensive to build. However, many dams are also used for flood control or irrigation, so building costs can be shared.
- Building a large dam will flood a very large area upstream, causing problems for animals that used to live there.
- Finding a suitable site can be difficult – the impact on residents and the environment may be unacceptable.
![Page 23: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/23.jpg)
Windmills are built together in a “wind farm.”
The use of a windmill to drive an electric generator.
![Page 24: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/24.jpg)
![Page 25: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/25.jpg)
![Page 26: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/26.jpg)
Video clip about Wind power
![Page 27: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/27.jpg)
How good an area for wind power is GA?
![Page 28: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/28.jpg)
•Wind is free, wind farms need no fuel. •Produces no waste or greenhouse gases.
•The land beneath can usually still be used for farming.
•Wind farms can be tourist attractions. •
A good method of supplying energy to remote areas.
![Page 29: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/29.jpg)
•The wind is not always predictable – some days have no wind.
•Suitable areas for wind farms are often near the coast, where land is expensive.
Noisy. A wind generator makes a constant, low, "swooshing" noise day and night. An entire wind farm makes quite a racket!
•Can kill birds - migrating flocks tend to like strong winds. Splat!
![Page 30: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/30.jpg)
Several ways to use the sun for power!
The energy received by Earth from the sun in the form of radiation.
![Page 31: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/31.jpg)
Solar cells to make electricity like your solar calculator does.
![Page 32: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/32.jpg)
Info on picture
Solar power plants that can produce large amounts of electricity instead
of for one house.
![Page 33: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/33.jpg)
Places where solar power plants would work!
![Page 34: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/34.jpg)
We even use solar power in orbit! Why would that be a good way to
power satellites?
Video clip on solar power
![Page 35: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/35.jpg)
•Solar energy is free - it needs no fuel and producesno waste or pollution.
•In sunny countries, solar power can be used where there is no easy way to getelectricity to a remote place.
![Page 36: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/36.jpg)
Doesn't work at night.
Very expensive to build solar power stations.
Solar cells cost a lot to make.
Can be unreliable unless you're in a very sunny climate.
![Page 37: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/37.jpg)
The energy produced by heat within the Earth.
![Page 38: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/38.jpg)
Sometimes it is very close to the surface.
![Page 39: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/39.jpg)
![Page 40: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/40.jpg)
Video clip on geothermal energy
![Page 41: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/41.jpg)
What do you think would be the advantages and disadvantages of geothermal energy?
![Page 42: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/42.jpg)
![Page 43: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/43.jpg)
![Page 44: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/44.jpg)
Biomass is the second most common form of renewable energy.
![Page 45: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/45.jpg)
What do you think would be the advantages and disadvantages of biomass energy?
Short video review of energy
![Page 46: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/46.jpg)
![Page 47: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/47.jpg)
•Use them only when necessary.•Take care of them even when you are not using them.
![Page 48: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/48.jpg)
![Page 49: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/49.jpg)
SoilSoil Conservation Conservation
n any method to maintain the fertility of the soil by protecting it. erosion
![Page 50: 09 10 Energy Sources Carol](https://reader033.vdocuments.us/reader033/viewer/2022051514/54b5fd994a7959b5368b4615/html5/thumbnails/50.jpg)
Soil Conservation Techniques
• Contour Plowing: farmers plow across the slope of hills to prevent erosion.
• Terracing: changes one steep hill into a series of smaller, flatter fields.
• Crop Rotation: farmers rotate the crops in their fields to use either less, or different nutrients from the soil.
• No-till farming: is the practice of leaving old stalks on the field instead of picking them up. It provides cover from the rain, and prevents erosion.