Efficiency and Energy Resources and their uses

Question 1

what are the two Efficiency formulas?

Answer 1

Efficiency = Useful output energy transfer ÷ total input energy transfer

Efficiency = Useful power output ÷ total power input

Question 2

what are Non-renewable Energy Resources?

Answer 2

• energy collected from resources that cannot be replaced when they are used up
• fossil fuels and nuclear fuel

Question 3

what are the three main fossil fuels?

Answer 3

coal, oil and natural gas

Question 4

what are Renewable Energy Resources?

Answer 4

energy that comes from a source that won’t run out

Question 5

what are the RER you need to know?

Answer 5

• The Sun
• Wind
• Water waves
• Hydro-electricity
• Biofuels
• Tides
• Geothermal

Question 6

how is transport used for energy resources?

Answer 6

vehicles can run on pure biofuels or a mix of a biofuel and petrol or diesel

Question 7

how is transport used for non-renewable energy resources?

Answer 7

petrol or diesel is used in most vehicles, created from oil
coal is used in steam trains to boil water to produce steam

Question 8

how is heat used for renewable energy resources?

Answer 8

• biofuel boilers work in the same way as gas boilers
• geothermal heat pump uses geothermal energy resources
• solar water heaters use the Sun to heat water which is then pumped into radiators

Question 9

how is heat used for non- renewable energy resources?

Answer 9

• natural gas is burnt to heat water in a boiler, this hot water is then pumped into radiators
• gas fires burn natural gas to heat rooms
• coal is burnt in open fireplaces