Science Energy Flashcards
(23 cards)
Source
Where something comes from
Non renewable
Can’t be replaced when it runs out
Renewable
Can be replaced and doesn’t get used up
Where are fossil fuels found and give a short description about them
They are found deep beneath the earth’s crust and under the sea. They are plentiful and quite cheap. They produce air pollution when they are extracted
3 examples of fossil fuels
Coal
Petroleum
Natural gas
Rocks that contain metal
Ore
What is converted to fuel at a nuclear power station
Uranium
True/false nuclear power station s are expensive to build and you have to build a new one every 50years
True
Short description on nuclear power plants
Don’t prouduce air pollution. Make radioactive waste that has to be buried beneath the ground in special containers
Fossil fuels
Fuels formed from the buried remains of dead animals and plants that lived millions of years ago
Ore
Rock that contains metal
Radio active
Gives off nuclear energy
Hydro power
Uses energy in moving water to produce electrical energy called hydro electric power
Wind power
Uses kinetic energy in wind that can be converted to electrical energy
Do hydro electric power stations produce air pollution and what renewable resource do they use
No, water
What are the bad things about wind farms
They are expensive to build
They look unattractive
They make a lot of noise
What is sunlight used for
Heating our homes and cooking. We use solar panels with photo volltaic cells to change the sun’s energy into electrical energy
What is sunlight used for
Heating our homes and cooking. We use solar panels with photo volltaic cells to change the sun’s energy into electrical energy
Explain solar panels
They have photovoltaic cells which change the sun’s energy into electrical energy. They can go up to 5 days without sunlight. You have to wipe the dust off them. They are expensive to purchase but it helps in the long run
Photovoltaic cells
Special batteries which converts the sun’s energy into electrical energy
Biofuels
Renewable fuel that is made from maize and sugar cane
Ethanol
Renewable fuel that can be used on its own or added to petrol. Made from sugar cane and in Brazil it is made from sugar cane and cassava
Wood
Renewable resource. The stored energy in wood change a to heat . Over 70% of African ppl rely on wood in their homes. But the cutting down of trees produces more air pollution and other environmental health problem s
