AS Environment Unit 5 Practice Exam

Explain why alternative fuels to coal are needed for electricity generation.

• Coal is a renewable fuel

• Coal doesn't produce CO2 emissions

• Coal is finite

• Alternative fuels contribute to acid rain

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NGSS.HS-ESS3-1

NGSS.HS-ESS3-2

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NGSS.HS-ESS3-5

In 2017, the United Kingdom generated electricity for 24 hours without using coal.

During these 24 hours, half of the energy came from natural gas and a quarter from nuclear

power. Wind, biomass and imported sources of energy were also used.

Which of the following would be a reason why the electricity generated from wind power was less than a

quarter of the total.

• The wind power was super affordable

• Not enough wind turbines

• The weather conditions were perfect

• Other energy sources were giving inadequate energy

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NGSS.MS-ETS1-2

Explain why burning biomass, such as wood pellets, can be described as carbon neutral

• Biofuels absorb the Co2 as they grow

• Burning biomass is not considered carbon neutral

• Cellular respiration allows plants to be carbon neutral

• None of the following

Answer explanation

Biofuels may be considered carbon-neutral because the plants that are used to make biofuels (such as corn and sugarcane for ethanol and soy beans and oil palm trees for biodiesel) absorb CO₂ as they grow and may offset the CO₂ emissions when biofuels are produced and burned.

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NGSS.HS-ESS2-6

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In 2020, the domestic use of coal and wet wood started to be phased out in the UK.

Wet wood is undried wood, with a moisture content of at least 20%. Wet wood produces more

smoke and particulates than dry wood when burned.

Describe how burning wet wood impacts human health

• Improve Eye circulation

• Not sure

• Wet Wood would release less CO2 thus not harming lungs

• Eye Irritation/Potential cancer agent

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NGSS.HS-LS2-7

What is a disadvantage of using imported sources of energy for electricity generation

• Job losses

• Conflict

• Increase in Poverty

• all of the following

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NGSS.HS-ESS3-2

NGSS.HS-ETS1-3

Identify which fuel source has decreased its contribution to total electricity production by

the greatest percentage since 1985.

• Coal

• Nuclear

• Oil

• HEP

The trend for natural gas shows an increase in its percentage contribution to total

electricity production since 1985.

Suggest reasons for this trend.

• New reserves were found

• Improved technology

• There was an increase in demand for it

• All of the following

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NGSS.MS-ESS3-1

NGSS.MS-ESS3-4

The bar chart in Fig. 2.1 shows the mass of waste disposed of using landfill and recycling for

seven countries in Europe in 2016.

Identify the number of countries in 2016 that disposed of more of their waste using landfill

than recycling.

• 1

• 5

• 4

• 3

Answer explanation

The total mass of waste disposed of in Germany in 2016 was 380 million tonnes.

Calculate the percentage of waste disposed of using landfill.

Give your answer to the nearest whole percentage.

percentage = ......................................................... [2]

• 44%

• 18%

• 30%

• 42%

Which of the following would the best strategy that would increase the amount of waste recycling.

• Education

• Build a simple recycling system

• Laws

• Economic Incentives

• All of the following

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NGSS.MS-ETS1-2