Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
18 Cards in this Set
- Front
- Back
|
When did the plantsand animals that have become fossil fuels live? |
Millions of years ago Before the dinosaurs. Some up to 300 millions years ago |
|
|
Howdid these plants and animals get their energy? |
Just as plants do today, those living millionsof years ago converted the sun's light energy into food (chemical) energythrough the process of photosynthesis.That 'solar' energy was and is transferred down the food chain in animals. Thisenergy provides living things with the energy to grow and live. When livingorganisms die the energy contained within them as chemical energy is trapped. |
|
|
What conditions wereneeded to turn these plants and animals into fossil fuels? (Temperature,pressure, other) |
What happened was prehistoricanimals and they were covered in layers of: mud, sand and dirt, which covered theplants. Pressure and heat below the Earth's surface gradually transformed theseremains into the different fossil fuels than can be found today. |
|
|
What proportion ofAustralia’s energy is gained from fossil fuels? |
Non-renewable fossilfuels (crude oil, natural gas, coal, oil shales and tar sands) currently supplyAustralia with more than 95% of our electrical energy need |
|
|
Fossilfuels mined/extracted in Australia |
There are five main Fossil fuels in Australia: 1.Coal 2.Natural Gas 3.Oil is mostly known as crude oil or condensate 4.Petroleum 5.Liquefiedpetroleum gas (LPG) |
|
|
Where in Australia is this type of energy sourceused to generate electricity? |
Hydroelectricity: Queensland, New South Wales, Tasmania, Victoria, Western Australia, ACT Biomass: Every State and territory Solar Energy: WA, NT, SA, QL, NSW, VIC Wind Energy: Queensland, New South Wales, Tasmania, Victoria, Western Australia, ACT |
|
|
How is this energy source used to produceelectricity? Solar |
SolarPV is like having a mini-power station on your roof because it can supply powerwithout being connected to an electricity grid. Solar thermal involves usingthe sun’s energy to generate electricity. Using large, polished metal mirrorsthat reflect the sun’s rays to heat a liquid and create steam, which spins aturbine that powers a generator to produce electricity. The clear flat panelsact like a solar oven, trapping the sun’s radiation between the layers. |
|
|
Hydro |
Hydroelectricityuses the energy of flowing water to produce electricity. The force of flowingwater is used to spin a turbine and operate a generator to produce electricity. |
|
|
Biomass |
There are several ways to capture energy from biomass, such as burning organic matter, such as sugar cane, collecting the gas released through this process and using it to run a generator, which produces electricity. |
|
|
Wind Energy |
A wind turbine captures the energy of the wind and converts it toelectricity as follows:The force of the windcauses the outer blades of the turbine to turn. |
|
|
What are the advantages of this energysource? Hydroelectricity |
Renewable energy source. Water is free. Nogreenhouse gases made. |
|
|
Biomass |
Fuel is cheap. Can use thing we will otherwise throw away.Findwaste everywhere Should not run out. |
|
|
Solar |
No greenhouse gases made. Sun will always be there. Energyfrom the sun is free. |
|
|
Wind |
Very few safety risks. Wind is free a will not run out. Doesnot create greenhouse gases. |
|
|
What are the disadvantages of this energysource? Hydro |
Dam is expensive to build. If it doesn’t rain, not enough water to turn the turbines. Nearbyareas could be flooded, which could affect the wildlife and animals. |
|
|
Biomass |
Greenhouse gases are made. Might not have enough space to grow enough biomass fuel. Peoplegrow biomass crops where we could grow food. |
|
|
Solar |
People don’t like the look of solar panels.Expensive to build solar power stations. Doesn't work at night |
|
|
Wind |
Can only be used in areas with lots of wind. Need lots of turbines to make lots of electricity. Could endanger wild life (birds) |
