Hydro Power PowerPoint

							 Hydro Power
       a
Renewable Source
      Of
    Energy



                   1
   What is Hydro Power?

Using moving water to
produce electricity.



                          2
    What are some examples of
    “moving water” that is used
      to generate electricity?

   Flowing water in streams and rivers
   Water falling over waterfall or dams
    (hydroelectric power)
   The ocean’s tides (tidal power)


                                           3
What does the word “hydro”
           mean?



WATER

                             4
When we use the water moving
   through a dam to create
 electricity, we call this ____.


Hydroelectric    power


                               5
    How does a hydroelectric plant work?




   The moving water turns wheels that run
    turbines that, in turn, run generators that
    make electricity.

                                                  6
What are some ADVANTAGES
 (good things) of hydroelectric
 power?
  + Once a dam & power plant is
   built the electricity is inexpensive

  + Does not cause pollution

                                      7
What are some (not so good
 things) DISADVANTAGES of
 hydroelectric power?

 1.   Dams may have negative effects
      on the environment

 2.   The interrupt the migration of
      fish.
                                       8
       What is Tidal Power ?
Using the movement of ocean water
  (the ebb and flow of currents) to
          produce electricity

             Animation of tidal
               behavior




                                      9
   Illustration of how
    tidal power works.
   The blades turn as
    the tide goes in our
    out
   The blades turn
    turbines that turn
    generators that
    generate electricity10
      Advantages of Tidal Power

+ large source of potential energy
+ Does not generate waste or pollution
+ Water is abundant (there is lots of it)
+ There will always be tides so we will
 always have this type of power.
+ May protect coastline against damage
 from high storm tides and provide a
 ready-made road bridge
                                      11
       Disadvantages of Tidal Power.

- Only a few coastal areas are suitable
- A dam across a bay blocks boats & fish
  from traveling up river
- Expensive to build




                                           12
              What causes tides?
   Tides and tidal currents are generated by
    gravitational forces of the sun and moon
    on the earth's waters. Due to its proximity
    to the earth, the moon exerts roughly
    twice the tide raising force of the sun.




                                                  13
    So where does tidal power get its
    energy from? In other words, what is
    its origin?

   If tides are generated by gravitational
    forces of the sun and moon on the earth's
    waters. Then…. The sun and moon is
    where the energy or power comes from.




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Neat Websites to look at:




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