Energy Efficiency Unit Review

Strong wind spinning a wind turbine can generate which type of energy?

• nuclear

• electrical

• thermal

• chemical

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Where does the energy in your home electrical outlets come from?

• Wires connected to a power plant

• We buy it from the electric company

• Lightning striking the house

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What spins a coal plant's turbine?

• Air

• Water

• Steam

• Cold air

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Two Disadvantages of Solar Power are:

• It is polluting

• It is not always sunny out

• It is inefficient (nor fully utilizing the Sun's energy)

• It cannot be stored at all.

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What happens to the temperature if more greenhouse gases are released into the atmosphere?

• Temperature goes up
• Temperature goes down

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Fossil fuels are classified as nonrenewable because they...

• require expensive equipment

• take millions of years to replace and the supply is finite

• can be found all over and the supply is infinite

• provide all the energy we use

• are made from carbon

Why do we use non-renewable resources instead of renewable resources?

• The cost is less expensive & produces a lot of energy

• Produces less energy & cleaner

• They help our environment & creates jobs

• They drive our economy & our fossil fuel reserves separate us from the rest of the world

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Why does too much carbon dioxide in the atmosphere cause climate change?

• It cools down our planet
• It blocks out UV rays
• It traps heat and warms up our planet
• It lets sunlight escape

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Which one of these does not add CO2 to the atmosphere?

• cooking with gas
• planting trees
• burning wood
• riding in a bus

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When steam or water are used to turn a turbine, it can generate

• electricity
• oil
• geothermal energy
• uranium

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