Unit 12: Energy

What percentage of the global energy consumption comes from fossil fuels?

• 25%

• 50%

• 84%

• 95%

Match the following energy products with the unit used to measure them.

• kilowatts per hour (kWh)

• Home electricity

• barrels (bbl)

• Natural gas

• kilowatts (kW)

• Wind power

• British thermal units (Btus)

• Oil or gasoline

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NGSS.HS-PS3-1

Which of the following is NOT true of coal usage?

• Coal usage consists of burning coal in order to produce steam in order to move a turbine & generate electricity.

• Coal usage is a completely renewable energy source.

• Coal usage contributes to increases in air pollutants, such as carbon dioxide, sulfur dioxides & toxic metal pollutants.

• Coal usage results in 2/3 of the energy "lost" as heat = not efficient.

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NGSS.MS-ESS3-4

Which of the following statements is NOT true of oil (petroleum)?

• Oil (petroleum) is the primary source of energy for transportation & consumption has risen dramatically in the last 50 years.

• Oil (petroleum) drilling has many potentially dangerous environmental impacts, especially when drilling in the oceans.

• Oil (petroleum) is only found in tar sands, in a form called bitumen.

• Oil (petroleum) is found in shales, which can contain oil in a few forms that can be extracted and used as an energy source.

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NGSS.MS-ESS3-4

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Which of the following statements is NOT true of natural gas?

• Natural gas burns cleaner than other fossil fuels (less CO2 emissions).

• Natural gas can only be trapped and stored when drilling for oil.

• Fracking is a common way to release natural gas, but this process comes with environmental concerns, especially related to water safety.

• Globally, natural gas is the 2nd largest commercial fuel source used

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NGSS.HS-ESS3-4

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Put the steps in order for the following process: What happens in a nuclear reactor.

• As more neutrons become available, more uranium-235 nuclei under fission, resulting in a chain reaction

• Uranium-235 pellets form rods that are grouped together as a fuel assembly.

• Uranium-235 nuclei undergo fission, releasing energy & more neutrons

• The fuel assemblies (uranium-235) are repeatedly struck by neutrons.

• Thousands of fuel assemblies are placed in the reactor core.

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NGSS.HS-PS1-8

Why are cooling solutions & cooling rods necessary in a nuclear reactor?

• To create unnecessary noise pollution
• To reduce the efficiency of the reactor
• To increase the risk of a nuclear meltdown
• To absorb and dissipate the heat generated during the nuclear fission process.

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NGSS.HS-PS3-4

Most energy sources (i.e. coal, solar, wind, nuclear) release heat that creates steam in order to ...?

• cool down the Earth
• turn turbines and generate electricity
• create wind
• power vehicles directly

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One of the greatest environmental concerns of using nuclear power is...?

• Increase in renewable energy sources
• Generation & storage of radioactive waste

• Reduction of biodiversity

• Increases in greenhouse gas emissions

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One of the oldest forms of harnessing energy for industrial purposes is through the use of ...?

• water wheels
• wind turbines
• solar panels
• nuclear reactors

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