Science 2 Flashcards
What are three examples of secondary energy sources?
Electricity, petrol and hydrogen gas
What does renewable mean?
It means it can be replaced soon?
What are the three main uses of energy sources?
Transportation, industry machines and heating/cooling
What is secondary data?
It’s data collected by other people
What is primary data?
It’s data you collect yourself
What do simple generators usually contain?
They usually contain a coil of wire and a magnet that can spin with a handle.
What do power station magnets use?
Electromagnets
How do fossil fuel stations work?
- Burn fuel to heat water
- Water turns to steam and moves turbine
- Turbine connects to generater producing voltage
- Steam is turned back to water.
Why are fossil fuel power stations commonly built near water?
They’re built there because fossil fuels commonly reside near bodies of water.
How are fossil fuels created?
They’re formed from dead plants and animals which have fossilised from pressure buildup
What do we mainly use solar energy for?
Heating stuff and generating electricity
What does a solar cell do?
It converts solar energy directly into a voltage
What does solar water heating use instead of a solar cell?
It uses solar panels instead.
How do you get geothermal energy?
You pump water down into the earth, heating it, and then pump it back up to use
What is a heat pump?
It pumps water a bit below a home so in winter it will be hotter, and summer cooler than the home temperature.
