P1.4 Methods we use to Generate Electricity Flashcards
Define renewable energy.
Renewable energy sources will not run out.
Define non-renewable energy.
Non-renewable energy sources will run out.
Of the non-renewable energy stations which has the shortest and longest start-up time?
Of the fossil fuel power stations, gas fired have the shortest start-up time.
Nuclear has the longest.
How do pumped storage systems work?
Can be used to meet demand, and as a means of storing energy for later use.
How are energy resources that produce heat used to generate electricity?
Fuel is burnt to heat water.
The steam produced drives a turbine that is coupled to an electrical generator.
How can water and wind be used to generate electricity?
Water and wind can be used to drive turbines directly.
How can solar cells be used to generate electricity?
Solar cells produce electricity directly from the sun’s radiation.
What is the advantage and disadvantage of using wind and solar?
Advantage - produce no CO2.
Disadvantage - not always sunny when we need energy.
What is geothermal energy?
In some volcanic areas hot water and steam rise to the surface.
The steam can be trapped and uses to drive turbines.
Where is small-scale production useful?
Small-scale production of electricity may be useful in some areas and for some uses.
eh hydroelectricity in remote areas and solar cells for roadside signs.
How do fossil fuels affect the environment?
CO2 leads to climate change and sulphur dioxide lead to acid rain.
How does nuclear power affect the environment?
The production of waste material called nuclear waste.
This radioactive and harmful to the environment.
How do renewable resources affect the environment?
Noise and visual pollution.
eg wind turbines.
The destruction of wildlife habitats.
eg hydroelectric schemes.
What is carbon capture and storage? CCS
To prevent carbon dioxide building up in the atmosphere we can catch and store it using chemical processes.
