Download Unit 3 lesson 3-5 teacher notes

Unit 3
Lesson 3: Nonrenewable Resources
Lesson 4: Renewable Resources
Lesson 5: Managing Resources
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Be Resourceful!
• Energy resource – a natural resource that humans
use to generate energy.
• 2 types
– Renewable – resources that can be replaced quickly
– Nonrenewable – resources that cannot be replaced easily
because they take a long time renew.
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2 Types of Nonrenewable
Resources
• 1. Fossil Fuels – nonrenewable energy that forms
from the remains or organisms that lived long ago.
• Release energy when burned.
• The energy can be converted to electricity.
• 3 Main types of fossil fuels
– 1. Petroleum – liquid also known as crude oil
• Liquid that comes from the ground. Diesel fuels and gasoline.
– 2. Natural gas – comes from the ground
• Used for cooking and heating. Methane, Butane and Propane.
– 3. Coal - solid comes from the ground.
• Once used to heat homes and run transportation.
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Formation of Petroleum and natural gas?
• 1. Marine organisms die and
settle to the bottom.
• 2. Layers of sediment slowly bury
the dead marine organisms.
• 3. Heat and pressure slowly turn
the remains into petroleum and
natural gas.
• 4. Petroleum and natural gas
flow through rocks, where they
become trapped and concentrated.
– Humans then extract the fuel.
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Formation of Coal
• 1. Partially decayed swamp plants sink
to the bottom and change into peat.
– Looks like rotting wood.
• 2. As sediment buries the peat, heat and
pressure change peat into lignite.
• 3. As sediment builds, heat and pressure
change the lignite into bituminous coal.
• 4. Heat and pressure continues to
change the bituminous coal into
anthracite coal.
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Problems with Fossil Fuels
• Burning them produces pollution.
• Releases carbon dioxide into atmosphere = Increase
in global warming.
• Creates smog and acid rain.
• Oil spills
• Flammable/combustible
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2 Types of Nonrenewable
Resources
• 2. Nuclear Fuel – the energy released when the
nuclei of atoms are split or combined.
– Nuclear fission – split an atom
– We use Uranium as the fuel,
which is nonrenewable!
– Nuclear fusion – combine atoms together
• The sun’s energy is a result of nuclear fusion
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Nuclear Fuel
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Dangers of Nuclear Fuels
• Produce dangerous waste that
is radioactive.
• Harmful radiation may also be
released into the environment.
• Can cause cancer from
radiation if the core melts.
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Lesson 4:
Renewable Energy
Resources
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Turn, Turn, Turn
• Wind energy – uses the force of moving air to drive
an electric generator or do other work.
– Wind is created by the sun’s uneven heating of air masses
in earth’s atmosphere.
– Wind is renewable!
– Turbines or windmills generate electricity by the moving
blades.
– They do not generate a lot of air pollution!
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Moving Water
• Moving water has kinetic energy!
• Hydroelectric energy – electrical energy that is
produced by moving water.
• The sun powers the water cycle
• Water is renewable!
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Let the Sunshine In
• Solar energy – the energy received by Earth from
the sun in the form of radiation.
• Solar panels to heat homes.
• Photovoltaic cell – used to convert
solar energy into electricity
- used in solar calculators
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Biomass Fuels
• Biomass – organic matter from plants and animal
waste that contains chemical energy.
• This energy can be used to cook food, provide
warmth, power engines.
• Biomass sources include trees, crops, alcohol, animal
waste and peat.
• Biomass Fuels are renewable!
• The sugars in corn and sugarcane are converted to
ethanol which can be burned as a source of fuel in
cars.
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Geothermal Energy
• Geothermal energy – energy produced by heat from
earth’s interior.
• Examples include: geyser, hot springs, volcanoes.
• Geothermal power plants pump the steam or hot
water from underground to spin turbines that
generate electricity.
• The electricity is generated from water heated by
magma pumped beneath Earth’s surface.
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Lesson 5:
Managing Resources
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Effective Ways to Manage
Resources
• Stewardship – the careful and responsible
management of resources.
• Conservation – the protection and wise use of
natural resources.
• Recycling – reduces the use of new resources.
– Reduce
– Reuse
– Recycle
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