unit 103 powerpoint 2

What is a responsibility mentioned in the text regarding energy use in dwellings?

• To increase energy consumption

• To reduce the carbon footprint

• To use only fossil fuels

• To ignore carbon emissions

Answer explanation

The text emphasizes the importance of reducing the carbon footprint in energy use for dwellings, making 'to reduce the carbon footprint' the correct choice. The other options contradict sustainable energy practices.

What is true about different forms of energy used in domestic dwellings?

• All forms produce the same amount of carbon emissions

• Some forms produce high carbon emissions, others less

• No forms produce carbon emissions

• All forms are renewable

Answer explanation

Different energy forms have varying impacts on carbon emissions. Fossil fuels like natural gas and oil produce high emissions, while renewable sources like solar and wind produce little to none, making the correct choice about their differences.

Why is it important to find cleaner sources of energy?

• Fossil fuels are unlimited.

• Fossil fuels are damaging the earth's climate.

• Cleaner energy is more expensive.

• Cleaner energy is less efficient.

Answer explanation

Finding cleaner sources of energy is crucial because fossil fuels are damaging the earth's climate, contributing to global warming and environmental degradation. Transitioning to cleaner energy helps mitigate these harmful effects.

What are examples of fossil fuels mentioned in the text?

• Solar and wind

• Coal, gas, and oil

• Nuclear and hydroelectric

• Biomass and geothermal.

Answer explanation

The correct answer is 'Coal, gas, and oil' as these are all examples of fossil fuels. The other options listed, such as solar, wind, nuclear, hydroelectric, biomass, and geothermal, are not fossil fuels.

What do all fossil fuels produce when burnt?

• Oxygen and nitrogen

• Carbon dioxide and water vapour

• Methane and hydrogen

• Sulfur dioxide and ozone

Answer explanation

When fossil fuels are burned, they primarily produce carbon dioxide and water vapor as byproducts. This is a result of the combustion process, where carbon in the fuel reacts with oxygen in the air.

Which of the following is one of the most damaging greenhouse gases?

• Methane

• Nitrous oxide

• Carbon dioxide

• Ozone

Answer explanation

Carbon dioxide is one of the most damaging greenhouse gases due to its significant contribution to global warming and climate change, making it a primary focus in environmental discussions.

What are some sources of carbon dioxide production mentioned in the text?

• Solar panels and wind turbines

• Power stations, boilers, and fires

• Electric cars and bicycles

• Geothermal plants and hydroelectric dams

Answer explanation

The correct choice, 'Power stations, boilers, and fires', are known sources of carbon dioxide production due to their combustion processes. In contrast, solar panels, wind turbines, electric cars, and hydroelectric dams produce little to no CO2.

Which of the following is considered a solid fuel?

• Fuel oil

• Natural gas

• Coal

• Electricity

Answer explanation

Coal is a solid fuel, while fuel oil and natural gas are liquid and gaseous fuels, respectively. Electricity is not a fuel in the traditional sense but a form of energy.

What type of energy source is petrol classified as?

• Solid fuel

• Oil

• Gas

• Electricity

Answer explanation

Petrol is derived from crude oil through refining processes, classifying it as an oil-based energy source. It is not a solid fuel, gas, or electricity, making 'Oil' the correct choice.

Which of the following gases is a non-renewable energy source?

• LPG

• Hydrogen

• Oxygen

• Helium

Answer explanation

LPG (liquefied petroleum gas) is derived from fossil fuels, making it a non-renewable energy source. In contrast, hydrogen, oxygen, and helium are not classified as non-renewable energy sources.