Transcript Energy Resources - Lake Elkhorn Wiki Home

What is energy?
Energy makes change possible!
The ability to do work.
Do we use energy everyday?
Forms of Energy
Potential
Kinetic
Chemical
Thermal
Mechanical
Mechanical (motion)
Nuclear
Sound
Electrical Energy
Sources of Energy
Hydropower
Nuclear
Wind
Solar
Fossil Fuels
Resources- Renewable vs.
Nonrenewable
Nonrenewable- Supplies
are limited.
92% of energy consumed
in the US comes from
nonrenewable sources.
Renewable- they are
naturally replenished
everyday!
Oil (petroleum)
8% of energy consumed
in the US comes from this
source
Natural gas
Biomass
Coal
Hydropower
Uranium
Solar
Wind
What is your energy IQ?
How much do you know about energy? Let’s
take the a quiz to see!
http://205.254.135.24/kids/energy.cfm?page=qui
z
Hydropower (hydro electrical)
RENEWABLE SOURCE
Relies on the water cycle
Mechanical energy from moving water
First hydroelectric plant opened in 1882 in Wisconsin
Most of US hydropower comes from west, such as the
Grand Coulee Dam
Hoover Dam is another famous Dam
Quebec, Canada
Nuclear
• NONRENEWABLE
Nuclear energy is energy from atoms
Energy is released from the atoms before it becomes
electricity
Fission- splitting atoms
Fusion- atoms are combined, this is the Sun produces energy
Uranium is used- common metal found in rocks
When it is split, it creates heat, which is used to produce
electricity
Perry Nuclear Plant, OHIO
Diablo Canyon, California
Wind
RENEWABLE SOURCE- energy from moving air
Wind is caused by uneven heating- hot air rises
(convection)
Old fashioned windmills are now called wind turbines
The fans of the turbine move with the wind, and turn
the generator to make electricity
In the US, only 2% of energy comes from wind
Solar
RENEWABLE SOURCE- found wherever the sun shines
Solar energy converted to thermal energy
Heat water, heat spaces, heats fluids
Converted in two ways:
Solar cells- change sunlight directly to electricity.
(EXPENSIVE)
Solar thermal/electric power plants- solar energy to heat a
fluid and produces steam that powers a generator.
13 plants in the US
Fossil Fuel
Nonrenewable
Oil (petroleum products-gasoline, diesel fuel and
propane), natural gas, coal
Come through ground as liquids, gases, and
solids
Burn fossil fuels for heat to generate electricity
Burning Fossil Fuels
U.S. Energy Consumption
(2010)
Biomass-4.4% (wood,
crops, manure, garbage)
Hydropower- 2.6%
Geothermal- 0.2%
Wind- 0.7%
Solar- 0.1%
Petroleum- 36.7%
Natural Gas-25.1%
Coal-21.2%
Uranium- 8.6%