National And Global Energy Sources

Question 1

What is a renewable energy resource

Answer 1

An energy source which can be replenished as its being used

Question 2

Give 4 examples of renewable energy resources

Answer 2

Wind, hydroelectric, tidal energy, solar energy,

Question 3

Give an example of a non-renewable energy resource

Answer 3

Fossil fuels (coal,oil and gas)

Question 4

What are the advantages of generating power using gas rather than coal

Answer 4

Flexible generation: gas power stations have short start-up times so can be switched on/off more readily
Lower emissions of carbon dioxide

Question 5

State two disadvantages of using renewable energy resources to generate power

Answer 5

Unreliable

Less efficient and economically beneficial

Question 6

Explain the environmental impacts of burning fossil fuels

Answer 6

CO2 contributes to the greenhouse effect and causes global warming
Sulphur Dioxide leads to acid rain which can damage buildings and crops

Question 7

State 3 advantages of fossil fuels as an energy resource

Answer 7

1. Reliable
2. Can produce large amounts of energy for a given quantities
3. Relatively abundant so cost effective

Question 8

State 3 advantages of nuclear power

Answer 8

1. Very large amounts of energy for relatively small quantities of fuel
2. Doesn’t release greenhouse gases and so doesn’t contribute to climate change
3. Low fuel costs

Question 9

State 3 disadvantages to nuclear power

Answer 9

1. Produces nuclear waist which is harmful to humans and must be safely stored for centuries
2. Non-renewable
3. Risk of nuclear accidents

Question 10

How does hydroelectric power produce energy

Answer 10

• rainwater collects behind a dam
• when this water is released it is used to turn a turbine
• this turbine turns a generator which produces electricity

Question 11

What are some disadvantages of using biofuels

Answer 11

1. When plants are burned they release CO2

2. To grow biofuels you need to destroy land