Get Energized!
Get Energized!
What is energy?
Nonrenewable
Energy Sources
Renewable
Energy Sources
Conserving Energy!
What is energy?
What Is Energy?????
What is energy?
Energy is all around you!
• You hear energy as sound, you see energy as light, you
can feel energy as heat or wind.
• Living organisms need energy for growth and movement.
• You use energy when you hit a tennis ball, lift an object, or
move in any way.
But what is energy? Energy
is the ability to do work or
cause changes in matter.
Where do we get energy?
• Energy comes from many different resources.
• Natural resources are things made by nature that people
need or use.
• All of Earth’s resources can be placed into two categories:
renewable and nonrenewable resources.
Nonrenewable energy resources
Nonrenewable Resources
Nonrenewable energy resources
Nonrenewable energy resources are being used up
faster than new ones can be made. Fossil fuels are
nonrenewable energy resources.
Fossil fuels, like coal, oil and natural gas, are energy
resources that store chemical energy.
Fossil fuels formed millions of years ago from
the remains of dead plants and animals.
The chemical energy stored in coal
comes from trees and plants
that lived millions of years ago.
Where does the chemical energy stored in oil and
natural gas come from? Dead animals!
Nonrenewable energy resources
In a power station fossil fuels can be burned to
generate electricity.
Is electricity a type of fuel?
Electricity is a type of energy, NOT a type of
fuel.
What type of energy is electricity?
Nonrenewable energy resources
Electricity is electrical energy.
Put the following types of energy in the correct order to
show how electricity is generated in a power station.
heat energy
stored chemical energy
electrical
energy
heat energy
stored
chemicalenergy
energy
mechanical
mechanical energy
electrical energy
Nonrenewable energy resources
Do you know your fossil fuels or are you a fossil fool?
1. Burning fossil fuels can be useful because it releases a
lot of—
a) energy
b) films
c) music
2. Fossil fuels are made from—
a) melted rock
b) old bones
c) decayed plants and animals
Nonrenewable energy resources
3. Nonrenewable energy resources—
a) cannot be used up
b) are used faster than they can be replaced
c) take about 50-100 years to be replaced
4. Coal is a—
a) nonrenewable resource
b) renewable resource
c) inexhaustible resource
Nonrenewable energy resources
5. Which of the following lists contains only nonrenewable
energy resources?
a) coal, biomass, hydropower
b) coal, petroleum, uranium
c) hydropower, wind, geothermal
6. Burning fossil fuels affects the environment by
creating—
a) pollution
b) oxygen
c) sunflowers
7I Fossil fuels – Are you a fossil fool?
7. Fossil fuels are non-renewable energy resources
because they cannot be—
a) repaired
b) replayed
c) replaced
8. Some scientists think a bad side-effect of burning
fossil fuels is—
a) cold weather
b) global warming
c) more homework
Renewable energy resources
Renewable Energy Resources
Renewable energy resources
Renewable energy resources will not run out and can be replaced.
But all energy resources have an environmental impact.
Renewable energy resources
The following renewable energy sources are used in the
United States to heat buildings and produce electricity.
Biomass is fuel that comes from plants and animals.
Biomass is burned to produce heat and electricity.
Hydropower is energy obtained from moving water.
The water turns large turbines which produce
electricity.
Geothermal energy is heat from melted rock deep
below Earth’s surface and can be used to heat
buildings and produce electricity.
Wind energy is used to turn large turbines. These
turbines produce electricity.
Solar energy is energy from the sun in the form of
light and heat. Solar energy can be captured to heat
buildings and produce electricity.
Renewable energy resources
Advantages of using biomass
Is a renewable energy resource
Contains energy absorbed from the sun
Can be burned to heat buildings and make
electricity
Can be used to make ethanol, a cleaner fuel than
gasoline
Disadvantages of using biomass
Contains less energy than fossil fuels so more must
be burned to obtain an equal amount of electricity
Can pollute the air and smells bad when burned
Transported by large trucks that can pollute the air
and require large amounts of gasoline to run
Renewable energy resources
Advantages of using hydropower
Is a renewable energy resource
Is the cheapest way to make electricity
Do not pollute the air
Lakes formed by dams can be used for recreational
purposes
Disadvantages of using hydropower
Building dams can flood parts of the land and
disturb habitats
Are not many good locations left in the US to build
dams for hydropower
Renewable energy resources
Advantages of using geothermal energy
Is a renewable energy resource
Comes from heat inside the Earth
Can be heat buildings and make electricity
Can be used to make ethanol, a cleaner fuel than
gasoline
Found in many places in the US
Disadvantages of using geothermal energy
Plants are very expensive to build
Geothermal steam can contain dangerous
chemicals
Must be used where it is found—cannot be
transported over long distances
Renewable energy resources
Advantages of using solar energy
Is a renewable energy resource
Comes from the sun
Can be captured to heat buildings and make
electricity
Is clean and free to use
Found everywhere
Disadvantages of using solar energy
Only available when the sun is shining
Solar power plants are more expensive to maintain
Hard to capture
Cannot be transported, must be used at source
Renewable energy resources
Advantages of using wind energy
Is a renewable energy resource
Caused by the uneven heating of the Earth’s surface
by the sun
Wind turbines capture wind energy to make electricity
Making electricity from the wind is very cheap
Disadvantages of using wind energy
Wind farms take up a lot of space
Not every area has enough wind to make electricity
Cannot be transported, must be used at source
Conserving Energy
Conserving energy
Conserving energy
Did you know that the energy needed to run a home
for a year creates more of the greenhouse gas
carbon dioxide than an average car?!
Decide if these statements about conserving energy at
home are true or false.
5. An
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2.
4.
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1. The
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saving
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electricity
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used
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a
regular
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about
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model
and
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walls
is
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TRUE!like
Energy
efficient
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might
cost
more
than
London
1000
times.
FALSE!
The
amount
of
carbon
dioxide
saved
any
other
cupboard.
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you
open
awould
fridge
one
third
of
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athey
year!
regular
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but
overall
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fill
the
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Albert
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door
for one minute, it takes three
minutes
model.
How
could this
energy
bebit
saved?
and
money!
How
many
energy
efficient
If
everyone
does
a
little
save
energy,
to cool down which uses up to
energy.
bulbs
do they
you have
at home?
together
can help
a lot!