http://www.darvill.clara.net/altenerg/ 1. Introduction What does the word “geothermal”mean? _______________________________________ ________________________________________________________________________ What’s the magnitude of temperature elevation when you go down? _________________ ________________________________________________________________________
1. How it works
2. Where can you find geothermal power stations?
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2. Advantages and disadvantages Advantages:
Disadvantages:
2. Summary • • • • • •
Geothermal energy means getting heat from hot rocks underground Hot water comes up out of the ground, and we use the heat to make steam to drive turbines, or to heat houses. We may have to pump water down first, or it may come up anyway Renewable - so long as we don't take out too much, the energy keeps on coming Not many places you can do it - the rocks must be suitable Sometimes we get poisonous gases coming up too
Quiz:
Geothermal power means getting ___________ from ____________rocks underground. This is ______________ so long as we don't take too much energy out and cool the rocks too much. Hot _______________ comes up out of the hole we've drilled and usually "flashes" into ___________. This can drive turbines and generators, to make ______________. At some sites we have to ___________ water down, at others hot water comes up anyway. Sometimes poisonous ___________ come up too. Geothermal power can occasionally be unreliable, and there are not many suitable sites because there needs to be the right type of ________ at a _______ we can reach, underneath rock which isn't too hard to ___________ through.
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