Raw material extraction

What is the term for the removal of natural resources from the earth's surface?

• Mining

• Extraction

• Harvesting

• Collecting

Answer explanation

The term for the removal of natural resources from the earth's surface is 'Extraction'. This process involves taking resources out of the ground or water for various purposes.

What is the small amount of coal used for in homes?

• Industrial purposes

• Domestic heat source

• Transportation

• Construction

Answer explanation

The small amount of coal used in homes is primarily for domestic heat sources, providing warmth and heating to households.

Which of the following is NOT a disadvantage of coal power plants?

• Emit pollution such as carbon dioxide, sulfur, mercury, selenium, and arsenic

• Technologies to reduce emissions are expensive

• Significant landscape impact

• Stable, large-scale electricity generation

Answer explanation

The correct choice is 'Stable, large-scale electricity generation' because it is not a disadvantage of coal power plants, unlike the other options which highlight negative aspects of coal power plants.

How is oil converted into energy in power plants?

• By burning oil to heat water and produce steam

• By directly converting oil into electricity

• By using oil to cool down turbines

• By mixing oil with coal

Answer explanation

By burning oil to heat water and produce steam

Which of the following is NOT a petroleum product derived from oil?

• Petrol

• Paraffin

• Diesel

• Natural gas

Answer explanation

The correct choice is Natural gas because it is not a petroleum product derived from oil, unlike Petrol, Paraffin, and Diesel.

Which of the following is NOT an advantage of using oil for energy?

• Stable, large-scale electricity generation

• Relatively cheap to extract and convert

• Highly polluting

• High-power electricity generation

Answer explanation

The correct choice is 'Highly polluting' because it is a disadvantage of using oil for energy, not an advantage.

How can burning gas be used to generate energy?

• By powering turbines with the waste heat powering a steam turbine.

• By directly converting gas into electricity.

• By using gas to cool down turbines.

• By storing gas in batteries.

Answer explanation

By powering turbines with the waste heat powering a steam turbine.

Which of the following is an advantage of using natural gas for electricity generation?

• It is highly polluting.

• It is unstable.

• It is relatively cheap to extract and convert.

• It is more expensive than coal or oil.

Answer explanation

Using natural gas for electricity generation is advantageous because it is relatively cheap to extract and convert compared to other sources like coal or oil.

What is a disadvantage of burning gases?

• They are highly polluting.

• They are difficult to transport.

• They are expensive to extract.

• They produce no emissions.

Answer explanation

Burning gases are highly polluting, making it a disadvantage due to the harmful emissions released into the environment.

Which of the following statements is true about natural gas emissions?

• Natural gas emits more carbon dioxide than coal.

• Natural gas emits carbon dioxide at half the rate of coal.

• Natural gas emits no carbon dioxide.

• Natural gas emits carbon dioxide at the same rate as coal.

Answer explanation

Natural gas emits carbon dioxide at half the rate of coal.