energy

Question 1

What is a renewable energy resource?

Answer 1

one that is being (or can be) replenished as it is used.

Question 2

What are the main uses of energy resources?

Answer 2

transport, electricity generation and heating

Question 3

What is a non-renewable energy resource?

Answer 3

resources which will eventually run out

Question 4

what are the renewable energy resources? (7)

Answer 4

bio-fuel
wind
hydro-electricity
geothermal
Tidal
Solar
water waves.

Question 5

What are the non-renewable energy resources? (4)

Answer 5

• Nuclear fuel
• coal
• oil
• gas

Question 6

benefits of fossil fuels:

Answer 6

-release lot of energy
-very reliable
-abundant, relatively cheap
-versatile

Question 7

disadvantages of fossil fuels:

Answer 7

-releases huge amount of CO2
-will run out
-can release other pollutants (ex. diesel releases carbon particles and nitrogen gas, coal :leads to sulfur dioxide, acid rain)

Question 8

advantages of renewable:

Answer 8

-don’t emit CO2
-don’t run out
-hydroelectricity is reliable

Question 9

disadvantages of renewable:

Answer 9

-can destroy habitats/ bad scenery
-not reliable(weather ones)
-only generate electricity

Question 10

what does nuclear power run on?

Answer 10

-uranium and plutonium

Question 11

advantages of nuclear power:

Answer 11

-once running, does not emit co2
-extremely reliable, generates lots of electricity

Question 12

disadvantages of nuclear:

Answer 12

-can release harmful radioactive materials
-decommissioning takes many years and costly
-generates dangerous radioactive waste, has to stored for thousands of years before it’s safe

Question 13

coal vs gas

Answer 13

-gas: short start up time
-emits less co2

Question 14

future UK generation:

Answer 14

renewables will make most energy, nuclear base load, gas for peak times

Question 15

how are homes adapted to reduce heat transfer

Answer 15

-cavity walls, air gaps, don’t allow conduction (air poor conductor)
-cavity wall insulation
-loft insulation
-2x glazed windows
-draught excluders

Question 16

difference betw biofuels and fossil fuels

Answer 16

bio: fuel that’s made from recently living organisms
fossil: fuel made from organisms that were alive millions of years ago

Question 17

benefits and disadvantages of biofuels

Answer 17

benefits
-can be mixed with fossil fuels
-renewable
-carbon neutral
-easy and cheap to make
-easy to transport

bad
-uses lots of land, cutting down forests, loads of CO2
-harvesting, processing, transport all require lot of energy, lots of CO2

Question 18

It is unlikely that all of the electricity that the UK needs can be generated by solar power systems. Explain why

Answer 18

-a really large area of land would need to be covered with solar cells

-due to the low useful power output of the solar cells