IGCSE Energy conservation

Why must energy be used sparingly and with the utmost efficiency?

• To increase the pollution caused by burning them

• Because the demand for energy decreases over time

• To conserve the finite non-renewable energy sources and avoid pollution

• Because energy is an infinite resource

Which of the following is a simple action that can help save energy in everyday life?

• Running the kettle, dishwasher, or washing machine when they are not full

• Charging your mobile phone overnight

• Walking or cycling to and from school instead of using a car

• Using computers and appliances without sleep or hibernate modes

What is the benefit of packing the empty spaces in the freezer and refrigerator with ice trays or polystyrene?

• It increases the amount of food you can store

• It makes the appliances look more full

• It reduces the energy it takes to cool or freeze things

• It is a recommended practice for aesthetic reasons

What was the percentage of electricity generated by coal in the UK in 1990?

• 64.2%

• 36.9%

• 21.5%

• 3.3%

By 2008, which non-renewable energy source saw a significant increase in its contribution to the UK's electricity generation compared to 1990?

• Oil

• Gas

• Nuclear

• Renewables

Which renewable energy source is the largest in the UK?

• Solar

• Hydroelectric power (HEP)

• Tidal

• Wind

What is the main reason for the UK to import increasing amounts of gas from countries like Belgium, Norway, Russia, and the Middle East?

• The UK's own gas fields are becoming exhausted

• Gas is cheaper to import than to produce domestically

• Imported gas is of higher quality

• The UK is expanding its gas storage facilities

What is expected to happen to the contributions of hydroelectric power and wind power to the UK's total electricity output in the future?

• They will decrease significantly

• They will remain the same

• They will be phased out

• They will be greater

Which of the following energy sources is considered the most sustainable for future energy production in the UK?

• Coal

• Natural Gas

• Solar

• Nuclear

What is the main environmental benefit of using wind power as a source of electricity?

• It produces greenhouse gases

• It requires a large amount of land

• It does not emit pollutants or greenhouse gases

• It is completely silent