Matt Doeden - Finding Out about Hydropower
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- Book:Finding Out about Hydropower
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- Publisher:Lerner Publishing Group
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- Year:2017
- Rating:5 / 5
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reproduced, stored in a retrieval system, or transmitted in any form or by any means
electronic, mechanical, photocopying, recording, or otherwisewithout the prior written
permission of Lerner Publishing Group, Inc., except for the inclusion of brief quotations in
an acknowledged review.
A division of Lerner Publishing Group, Inc.
241 First Avenue North
Minneapolis, MN 55401 USA
pages cm. (Searchlight books What are energy sources?)
Includes index.
ISBN 9781467736596 (lib. bdg. : alk. paper)
ISBN 9781467746397 (eBook)
1. Water-powerJuvenile literature. I. Title.
333.914dc23
1 BP 7/15/14
HYDROPOWER?
HYDROPOWER
OF HYDROPOWER
HYDROPOWER?
current of a fast- moving
river. The water
rushes around you.
It pushes on your
feet and your legs. If
the current is strong
enough, it can knock
you over. Then it can
carry you down the river.
strong current is hard work.
What can happen if the
current is too strong?
water against your
legs comes from
kinetic energy. All
moving objects have
this energy. We can
use the kinetic energy
of moving water to
produce electricity.
This is called
hydropower.
have kinetic energy.
a rushing river get its kinetic energy? It comes from the
sun! But it is not direct. There are a few steps along
the way.
the water cycle, which is
powered by the sun.
evaporates and creates clouds.
Thats how water moves around the world. Think of the
sun beating down on an ocean or a lake. The suns heat
causes some of the water to turn into vapor. The vapor
collects and forms clouds.
clouds move over
land. Some of the
vapor falls as rain
or snow. Rain and
melted snow run off
into rivers. The rivers
empty into oceans
and lakes. Then the
cycle starts all over
again. As long as the
sun keeps shining,
Earths water will
keep moving.
the water cycle.
Even small streams can create it. But large, fast- moving
rivers create the most.
CAN CREATE A LOT OF HYDROPOWER.
energy depends on
its size and its speed.
A speeding car has
a lot more of it than
a speeding bicycle.
The same is true
for water. The more
water a river has, the
more energy we can
get from it. Thats
why most hydropower
plants, or hydro plants,
are on big rivers.
when you ride your bike.
HYDROPOWER
energy in moving water for
thousands of years. People built
waterwheels on rushing rivers in
ancient Rome and China.
used waterwheels to
collect energy. How long
have people been using
energy from moving water?
The moving water pushed on them and spun the wheel.
A stone was attached to the wheel to crush grain. A
blade could be attached to cut wood as the wheel spun.
people crush grain
more easily.
Instead, we use dams and other machines to turn the
waters energy into electricity.
a lot of electricity.
kinetic energy into electricity. They built the first hydro
plants. The electricity the plants created powered nearby
homes and buildings.
plant in Oregon.
plants use three
main parts. They
are the dam, the
reservoir, and the
generator. It all
starts with the dam.
Large dams stretch
across a river. They
block the flow of the
rivers water.
across the Colorado River on
the Arizona- Nevada border.
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