Energy - Energy Resources

Question 1

what are the non renewable energy resources

Answer 1

coal oil gas nuclear fuels

Question 2

what are the problems associated with renewable energy

Answer 2

less reliable

dont provide as much energy

Question 3

name 3 uses of energy

Answer 3

transport, heating, electricity

Question 4

how can oil heat your home

Answer 4

burning oil from a tank witch is good for remote places

Question 5

how does natural gas heat your home

Answer 5

gas burned to heat water which is pumped into radiators

Question 6

how do wind turbines generate electricity

Answer 6

wind turns the turbine which drives a generator which produces electricity

Question 7

pros of wind turbines

Answer 7

no pollution
no permanent damage to landscape
no fuel cost
minimal running cost

Question 8

cons of wind turbines

Answer 8

eyesore
noisy
weather dependant
cant increase supply if there is more demand
have to be stopped if wind is too strong
high initial costs

Question 9

how do solar cells generate electricity

Answer 9

generate electric current directly from the suns radiation

Question 10

pros of solar cells

Answer 10

no pollution
low running costs
can be plugged straight into electrical components
good for remote locations

Question 11

cons of solar cells

Answer 11

weather dependant
lots of energy is required to manufacture in the first place.
high manufacturing costs

Question 12

how does geothermal power generate electricity

Answer 12

thermal energy store of hot underground rocks
steam and hot water rise to the surface and are used to drive a turbine. the turbine turns a generator which generates electricity.

Question 13

pros of geothermal

Answer 13

reliable
can heat buildings directly
cost of building power station is high con

Question 14

cons of geothermal

Answer 14

location dependant

Question 15

how do hydroelectric power stations generate electricity

Answer 15

a dam is built and water is let out at a controlled rate through turbines. a generator is driven by the turbines which generates elecrity

Question 16

cons of hydroelectric power

Answer 16

flooding of ally leads to rotting vegetation which releases methane and co2. and a loss of habitat for people as settlements are flooded and animals.
reservoirs look unsightly when they dry up
high initial cost

Question 17

pros of hydroelectric power

Answer 17

no pollution 
immediate response to an increased demand.
normally reliable
no fuel cost
minimal running costs
good for remote areas

Question 18

how does wave power generate electricity

Answer 18

lots of small wave powered turbines. As the weaves come in they give an up down motion wich forces air into a turbine to drive it.

Question 19

pros of wave energy

Answer 19

no pollution, low running and no fuel costs

Question 20

cons of wave energy

Answer 20

disrupting sea bed and marine habitat
spoiling view
hazard to boats
unreliable

Question 21

how do tidal barrages generate electricity

Answer 21

big dams built along river estuaries
when the tide come in the water is held back
its then released through turbines

Question 22

pros of tidal barrages

Answer 22

no pollution
reliable
no fuel costs
minimal running cost

Question 23

cons of tidal barrages

Answer 23

prevents free boat access 
spoiling view
altering habitat 
expensive to build 
dont work when water is the same level each side

Question 24

why are biofuels fairly reliable

Answer 24

short time to grow and different crops can be grown all year round

Question 25

how can biofuels respond to an increase in energy demand

Answer 25

stored for when they are needed

Question 26

what are some negatives of biofuels

Answer 26

cost to refine is high
some worry the space they use means there isnt enough space for crops grown for food
forests have been cleared to make room to grow biofuels
biofuel production creates methane emissions

Question 27

how are fossil fuels used to make energy

Answer 27

fuel in boiler
steam send to turbine which drives it
cooled water returns to boiler
turbine turns a generator

Question 28

pros of fossil fuels

Answer 28

cost effective
provides lots of energy
readily available
reliable

Question 29

cons of fossil fuels

Answer 29

slowly running out
releases co2
burring coal and oil releases sulphur dioxide which causes acid rain
coal mining makes a mess of the landscape
oil spillages cause environmental problems

Question 30

how can acid rain be stopped from coal and oil

Answer 30

sulphur removed from fuel before its burned

cleaning up emissions before they are released

Question 31

how does nuclear fuel work

Answer 31

nuclear fission of uranium or plutonium releases the energy to heat the water then it works the same as fossil fuels

Question 32

pros of nuclear fuel

Answer 32

doesn’t release harmful gasses
nuclear is fuel is quite cheap
reliable

Question 33

cons of nuclear fuels

Answer 33

dangerous waste
stays highly radioactive for a long time
power stations and shutting them down is expensive
equitment faliur can lead to catastrophe

Question 34

what are the tends of recent electricity use

Answer 34

20th century it increased

since 21st centuary its been decresing slowly due to ada appliances become more efficient

Question 35

what made the goverment want to move towards renewables

Answer 35

public pressure and pressure from other countries

Question 36

highlight factors limiting change of fuel

Answer 36

scientists can only give advice
there are also other polital, social, ethical issues to consider
people dont want to live next to a wind farm
renewables are not as reliable
research into improing reliability costs mony
hybrid cars are more expensive