Transcript Energy Resources

ENERGY RESOURCES
Nonrenewable
Bellringer
 Identify the following as a renewable or
nonrenewable resource.
 1. sunlight
 2. coal
 3. wind
Nonrenewable resource
 Cannot be replaced or are replaced much more
slowly than they are used.
Fossil Fuels
 A nonrenewable resource.
 Def. Energy resource formed from the
remains of organisms that lived long ago.
Types of Fossil fuels
1. Coal – most coal used in the US is burned to
produce steam to run electric generators.
2. Petroleum – gasoline, kerosene, wax, and
petrochemicals come from petroleum.
1. Finding alternative energy resources will become
more important in years to come.
3. Natural Gas - is used in heating systems,
stoves, ovens, and vehicles.
1. Has the lower emission levels when burned.
Coal Used in USA
Electric power
Industrial uses
Coal exports
Electrical Energy from fossil fuels
 Generates from burning fossil fuels.
 Electrical generators convert the chemical
energy in fossil fuels into electrical energy.
Converting Fossil Fuels into
Electrical Energy
1. Water is pumped into a boiler.
2. Coal, oil, or natural gas in burned in a
combustion chamber. The chemical energy of
the fossil fuels is converted into thermal energy.
3. Thermal energy is used to boil water and turn it
to steam.
4. Thermal energy is converted into kinetic energy
as the steam pushes against the blades of the
turbine.
5. An electric generator converts kinetic energy
into electrical energy.
6. The electrical energy can be distributed to a
community through electrical wires.
Other examples of
Nonrenewable Resource
 All elements on the Periodic Table.
Nonrenewable Resources Types
 Generates electrical energy from fossil fuels.
1. Fossil fuels – chemical energy in fossil fuels
is changed into the electrical energy that you
use everyday. (Electric generators)
Nonrenewable Resources Types
2. Nuclear Energy
- generates thermal energy that boils water to
make steam.
- Kinetic energy into electrical energy.
*** The fuels used in nuclear power plants
differ from fossil fuels. **
Nuclear Energy cont.
 Nuclear energy is generated from radioactive
elements – such as uranium.
 Nuclear fission – the nucleus of uranium atom
splits into 2 smaller nuclei, which releases
nuclear energy.
 The supply of these elements is limited.
Renewable Resources
 Def. – are naturally replaced more quickly
than they are used.
 Ex: Solar energy and wind energy are
limitless.
Renewable Resources Types
1. Solar energy – (Roof of homes)
1. Sunlight can be changed into electrical energy
through solar cells.
1. Solar panels can be used to heat as well.
Renewable Resources Types
2. Energy from Water –
- Potential energy of water in a reservoir can
be changed into kinetic energy as the water
flows through a dam which is called a
hydroelectric dam.
Energy from water cont…
 How it works:
 Falling water turns turbines in the dam.
 The turbines are connected to a generator that
changes kinetic energy into electric energy.
Renewable Resources Types
3. Wind Energy –
- Wind is caused by the sun’s heating of Earth’s
surface.
- Earth’s surface is not heated evenly, wind is
created.
Wind Energy cont….
How it works –
 Wind turbines changes the kinetic energy of
the air into electric energy by turning a
generator.
Renewable Resources Types
4. Geothermal Energy
Def : Thermal energy caused by heating of
Earth’s crust.
Geothermal Energy cont….
 How it works:
 Some geothermal power plants pump water
underground next to hot rock.
 The water returns to the surface as steam, which
can then turn the turbine of a generator.
Renewable Resources Types
5. Biomass –
Def: Organic matter, such as plants, wood, and
waste, that can be burned to release energy.
Biomass cont….
 Plants use and store energy from the sun,
which is called photosynthesis.
 Wood burned to generate electric energy.