energy resources

Question 1

what is non renewable energy?

Answer 1

energy from finite resources.

Question 2

what is renewable energy?

Answer 2

energy from resources that will never run out.

Question 3

what are 4 non renewable energy sources?

Answer 3

1. coal.
2. oil.
3. gas.
4. nuclear

Question 4

what are 7 renewable energy sources?

Answer 4

1. solar
2. wind
3. waves
4. hydro electric
5. bio fuel
6. geothermal
7. tidal

Question 5

what are positives of non renewable energy?

Answer 5

it is reliable.
can respond quickly to energy demand.
cost effective.

Question 6

what are negatives of non renewable energy? there is lots

Answer 6

they will run out one day.
they damage the environment.
contribute to global warming. release CO2
causes acid rain. release sulfur dioxide SO2
coal mining messes up the environment.
oil spills pollute the ocean.
nuclear waste is very dangerous.
nuclear power can cause disasters. like chernobyl

(can summarise to finite and pollution probably)

Question 7

what are positives of renewable energy?

Answer 7

they will never run out.
they release little or no emissions.

Question 8

what are negatives of renewable energy?

Answer 8

some renewables are unreliable.
they don’t provide much energy.
most renewables damage the environment (but less than non renewables)

Question 9

what are two places energy can be used?

Answer 9

transport.
heating.
only these 2 are listed in the book🤷.

Question 10

how does wind power work?

Answer 10

wind turbines in exposed places use wind to turn blades which turn a generator to produce electricity

Question 11

what are negatives of wind turbines?

Answer 11

you need 1500 to match 1 coal plant.
they are noisy.
they spoil a view.
wind cannot be controlled to match demand.
initial high cost.

Question 12

what are positives of wind turbines?

Answer 12

minimal running cost.
no permanent damage to land.

Question 13

how do solar cells work? solar energy

Answer 13

solar cells generate electric currents from sunlight.

Question 14

what are negatives of solar cells?

Answer 14

only work in the daytime.
power output can’t increase to match demand.
initial high cost.

Question 15

what is geothermal energy used for? (2)

Answer 15

heating.
generating electricity.

Question 16

what are positives of solar cells?

Answer 16

very reliable in sunny countries.
no pollution.
minimal running cost.

Question 17

how is geothermal energy used for heating?

Answer 17

water is pumped underground where it heats up and hot water is pumped back overground.

Question 18

how is geothermal energy used for electricity?

Answer 18

water is pumped underground where it turns to steam which rises and spins turbines that spin generators.

Question 19

what are negatives of geothermal energy?

Answer 19

there aren’t many suitable locations.
the cost of a power plant is high compared to the energy it generates.

Question 20

where does geothermal energy come from?

Answer 20

hot rocks.
magma.
radioactive decay.

Question 21

what are positives of geothermal energy?

Answer 21

very reliable.
little damage to the environment.

Question 22

how does hydro electric power work?

Answer 22

water behind a dam falls spinning turbines which spin generators.

Question 23

what are negatives of hydro electric power?

Answer 23

a large are has to be flooded.
possible loss of habitat.
rotting vegetation releases CO2 and methane.
flooded areas look ugly when they dry up.
high initial cost.

Question 24

what are positives of hydro electric power?

Answer 24

immediate response to demand.
reliable except in drought.
minimal running cost.
useful in remote areas.

Question 25

how does wave power work?

Answer 25

lots of little turbines are spun by waves which spin generators.

Question 26

what are negatives of wave power?

Answer 26

disturbs the seabed. spoils view. hazard to boats. unreliable. unlikely to provide energy on a large scale. initial high cost.

Question 27

what are positives of wave power?

Answer 27

no pollution. minimal running cost.

Question 28

how does tidal power work?

Answer 28

tidal barrages *dams across river estuaries* contain turbines connected to generators which spin when tides come in or out.

Question 29

what are negatives of tidal power?

Answer 29

prevent access by boats. spoil the view. alter habitat. tide size changes. *smaller tide produces less energy* initial high cost.

Question 30

what are positives of tidal power?

Answer 30

no pollution. reliable. *always twice a day* minimal running cost. can generate a lot of energy.

Question 31

what are bio fuels?

Answer 31

energy sources made from plants or animal shit *can be solid liquid or gas* which are burnt to produce electricity.

Question 32

what are negatives of bio fuel?

Answer 32

high cost to refine. *turning material to fuel* land is cleared to grow bio fuels. increased CO2 and methane emissions.

Question 33

what are positives of bio fuel?

Answer 33

reliable. carbon neutral *if you burn the same amount you grow*