Energy Resources Flashcards
How is geothermal energy generated?
in volcanic areas water can be put in pipes over hot rocks to create steam, the steam goes into a generator which is being spun by a turbine
How is wave energy generated?
a long snake is used to turn the up and down motion of the sea, goes through the genarotor which is being spun by a turbine
How is nuclear energy generated?
a nuclear reactor creates steam that goes through a genarator which is being spun by a turbine
How is biomass energy generated?
organic matter is burnt, (not releasing CO2 or SO2) the steam which is being spun by a turbine
How is coal energy generated?
in a boiler, the coal is being burnt transfering its chemical energy into heat energy, that heat is used to boil water and create steam which then goes through a genarator which is being spun by a turbine
How is wind energy generated?
wind turns the genarator creating power
How is tidal energy generated?
Huge amounts of water move in and out of river mouths each day because of the tides. A tidal barrage is a barrier built over a river estuary to make use of the kinetic energy in the moving water. The barrage contains electricity generators, which are driven by the water rushing through tubes in the barrage.
How is hydroelectricity energy generated?
damming a river, using the enrgy of the falling water to turn the turbine and genarator
why is renewable energy important?
because it has less of a carbon footprint
what are the energy transfers for wind turbines?
kinetic -> mechanical -> kinetic (generator) -> electrical
What can fossil fuels be used for?
the chemical potential energy stored in oil, coal and gas can be turned into heat energy by buring them. we can also turn it into electrical energy to use in our homes.
what are the different energy stores and transfers of a thermal power station?
chemical store of fossil fuels heat transfer thermal store of flue gasses heat transfer thermal store of the steam mechanical transfer kinetic store of the steam mechanical transfer kinetic energy of the turbine mechanical transfer kinetic store of the generator heat transfer thermal store from the cooling tower heat transfer thermal store from the air of the cooling tower
What are the non renewable energy resouces?
fosssil fuels (coal, gas, oil), nuclear fuel
what are the renewable energy resources?
bio fuel, wind, hydroelectricity, geothermal, tidal, solar, wave
What is the energy store being used in fossil fuels?
chemical energy
What is the energy store being used in nuclear fuel?
nuclear energy
What is the energy store being used in bio fuel?
chemical energy
What is the energy store being used in wind?
kinetic energy
What is the energy store being used in hydroelectric?
gravitational potential energy
What is the energy store being used in geothermal?
internal (thermal) energy
What is the energy store being used in tidal?
kinetic energy
What is the energy store being used in solar?
nuclear energy
What is the energy store being used in wave?
kinetic energy
What are the advantages and disadvantages of fossil fuels?
advantages:
cheap
most used energy resource
using it does not depend on enviromental factors
disadvantages:
Releases CO2 and SO2 (causing global warming and acid rain)
Can be dangerous if used irresponsibily
They are a non renewable energy source
What are the advantages and disadvantages of Nuclear fuel?
advantages:
No CO2 and SO2 being produced
Very low fuel costs.
Power station has very long lifetime
disadvantages:
Radioactive waste (needs to be disposed of safely)
cost of building is high
Cannot react quickly to changes in electricity demand.
They are a non renewable energy source
What are the advantages and disadvantages of Biofuel?
advantages:
Renewable
Carbon neutral so low impact on enviroment
Reduce our reliance on fossil fuels.
disadvantages:
Uses land that could be used to grow food.
Needs a lot of labour.
What are the advantages and disadvantages of wind?
advantages:
Renewable source
Cheap to run (no fuel costs)
No polluting gases produced
disadvantages:
Expensive to build
Noise pollution
can only be used in very windy areas so not reliable
What are the advantages and disadvantages of hydroelectrity?
advantages: Renewable source Cheap to run (no fuel costs) No polluting gases produced Very reliable Can be switched on when needed
disadvantages:
flooding a large area means people can loose their homes and animals can lose their habitat
Visual pollution
What are the advantages and disadvantages of geothermal?
advantages:
no poluted gasses
renewable
disadvantages:
has to be in a volcanic area
What are the advantages and disadvantages of tidal?
advantages:
high poweroutput
renewable
disadvantages:
Building barrages has a significant impact on migratory fish and habitats of sea birds - it can also hinder coastal shipping movements
What are the advantages and disadvantages of solar?
advantages:
Cheap to run (no fuel costs)
No polluting gases produced
disadvantages:
Dependant on the weather and only available during daylight
It costs a lot of money to make them more efficient
What are the advantages and disadvantages of wave?
advantages:
Renewable
No polluting gases produced
disadvantages:
could be effect on local habitat
Define Non renewable
A non-renewable energy resource is one that has a finite supply and it will run out at some stage.
