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What is Hydroelectricity?
How does it work?
Advantages
Disadvantages
Examples and Pictures
Future- for this renewable energy
Facts
Online Quiz
Quiz have you been listening?
Question Time
The name Hydroelectricity comes
from the Greek word ‘hydro ’that
means water.
 When we use the energy in flowing
water to produce electricity, we call it
hydroelectricity.
 Hydroelectricity makes a major
contribution to the worlds energy
supplies- more than any other kind of
renewable resources

 There
are two main ways of using the
energy in flowing water to produce
electricity.
 Hydroelectric dams trap flowing water
then release it again under greater
pressure.
 A river flowing through a valley is blocked
by building a large concrete dam.
 The valley is flooded by the river, creating
a reservoir of water, like a man made lake.
Once
construction completed,
operating costs are very low.
No waste or pollution is
produced.
Electricity can be generated
constantly, because water can
be stored and used when
needed.
Dams
are very expensive to
build.
Hydroelectricity sites are often
remote, which leads to higher
distribution costs.
Suitable sites for large-scale
projects are hard to find.
We think that the future for
hydroelectricity is very bright, but
finding a place to manufacture it
could be quite hard during the
economical downturn in Ireland.
Hydroelectricity is a very smart
idea, and in the future will
probably produce lots of jobs in
Ireland.
 One
of the best ways to produce electricity is
through moving water.
 China
generates more hydroelectricity than any
other country in the world.
 Hydroelectricity
is the term referring to
electricity generated by hydropower.

Lester Pelton invented hydroelectricity.

The name Hydroelectricity comes
from the Greek word “____” that
means water.

Dams are very ________to build.

The Aswan dam is in _____.

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