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energy resources Flashcards

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1
Q

what are the main energy resources available for use on earth

A

fossil fuels, nuclear, biofuel, wind, hydroelectricity, geothermal, tidal, sun and water waves

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2
Q

what are the three fossil fuels

A

coal, oil and natural gas

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3
Q

what is renewable energy

A

a resource that is replenished as it is used

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4
Q

what is non renewable energy

A

a resource that is used faster than is can be replenished, will run out eventually

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5
Q

what used do we have for energy resources

A

transport, electricity generation and heating

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6
Q

what are examples of renewable energy resources

A

biofuel, wind, hydroelectricity, geothermal, tidal wave and the sun

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7
Q

what are examples of non renewable energy resources

A

coal oil natural gas and nuclear

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8
Q

how is electricity generated through wind

A

the wind has kinetic energy which turns the blades on a wind turbine

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9
Q

what are advantages of wind turbines

A

renewable, conserves fossil fuels, no release of pollutant gases, does not contribute to global warming

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10
Q

what are the disadvantages of wind turbines

A

noise pollution, visual pollution, kill birds, dont work when its not windy

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11
Q

what are the advantages of tidal turbines

A

renewable, conserves fossil fuels, no release of pollutant gases, does not contribute to global warming

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12
Q

what are the disadvantages of tidal turbines

A

noise polluyion, visual pollution, kills fish, low power output

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13
Q

how is electricity generated through geothermal energy

A

cold water is pumped into the ground and is heated by hot rocks. the water returns to the surface as steam, the moving steam turns a turbine which turns a generator

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14
Q

what is nuclear energy

A

fission of uranium nuclei that heats water

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15
Q

what is geothermal energy

A

energy from the earths core used to heat water

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16
Q

how is electricity generated through hydroelectricity

A

water in high level reservoirs stores gravitational potential energy, the water flows downhill and has kinetic energy, the water turns a turbine connected to a generator

17
Q

what are the advantages of hydroelectricity

A

renewable, conserve fossil fuels, no release of pulltant gases, does not contribute to global warming, constant reliable power

18
Q

what is the energy source biofuel

A

gases from rotting plant material are burned into heat water

19
Q

what are the disadvantages of hydroelectricity

A

noise pollution, visual pollution, kills fish, low power output

20
Q

how is water heated to generate electricity in a solar thermal power station

A

water is heated in a boiler which turns into steam. the steam turns a turbine which turns a generator

21
Q

what are the advantages of nuclear fuel

A

produces no greenhouse gases, higher energy density in fuel and a longer operating life

22
Q

what are the disadvantages of nuclear fuel

A

produce radioactive waste, possibility of accidents,long start up time and high decommissioning costs

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