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* Lakes are large bodies of water that are
surrounded by land and are not connected to
an ocean. Lakes are relatively still bodies of
water when compared to a river where the
water flows. They can contain either salt or
fresh water and are larger than ponds.
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http://knowlera.vo.llnwd.net/o18/data/clip25429-What-Is-A-Lake%3F
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* The Dead Sea in Israel is the world's lowest lake at 1,371 feet
below sea level.
* The highest lake in the world is Ojos del Salado at 20,965
feet high. It is located in a crater in the Andes Mountains on
the border between Chile and Argentina.
* A subglacial lake is a lake that is permanently covered by ice.
The largest of these is Lake Vostak in Antarctica.
* Lakes can form in interesting different ways such as in the
craters of volcanoes, by sinkholes in the ground, or even
artificially by dams made by man.
* There are over 187,000 lakes in Finland giving the country
the nickname The Land of the Thousand Lakes.
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* A river is a flowing, moving stream of water. Usually a river
feeds water into an ocean, lake, pond, or even another river.
Rivers can vary in size and there is no hard definition or rule
on how big a flow of water must be to be categorized as a
river. Water from a river can come from rain, melting snow,
lakes, ponds, or even glaciers. Rivers flow downhill from their
source. They are considered part of the freshwater biome.
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http://www.brainpop.com/science/earthsystem/rivers/
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http://knowlera.vo.llnwd.net/o18/data/clip24810-What-Is-A-River%3F
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* There are 76 rivers in the world over 1000 miles long.
* The longest river in the world is the Nile River, 4132 miles in length
* The second longest river in the world is the Amazon River, it reaches
around 6400 miles in length.
* The United States alone has around 3.5 million miles of rivers.
* The longest river in the USA is the Missouri River, stretching around
2,340 miles in length.
* A lot of people think that rivers always flow south, but 4 of the 10
longest rivers in the world flow north.
* World Rivers have been a great source of trade and transport
throughout human history.
* Rivers have many uses which include fishing, bathing, transport, rafting
and swimming among others.
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* Most of the world’s major cities are located near the banks of rivers.
* On January 15 2009, a US Airways plane successfully made an
emergency landing in the Hudson River that runs through New York.
After being hit by birds, the pilot of flight 1549 managed to land the
plane in the river with the loss of no lives.
* Water that collects or flows beneath the
Earth's surface, filling the porous spaces in soil,
sediment, and rocks. Groundwater originates
from rain and from melting snow and ice and is
the source of water for aquifers, springs, and
wells.
* Ground water is water located beneath the
surface of the earth.
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* Groundwater supplies drinking water for 51% of
the total U.S. population and 99% of the rural
population.
* Groundwater helps grow our food. 64% of
groundwater is used for irrigation to grow
crops.
* Groundwater is an important component in
many industrial processes.
* Groundwater is a source of recharge for lakes,
rivers, and wetlands.
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* Glaciers are huge masses of ice. They can only
form in places where more snow falls in the
winter than melts in the summer.
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http://www.alaskacenters.gov/glacier-fun-facts.cfm
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A glacier is a large, flowing river of ice that usually moves very
slowing.
When a chunk of ice breaks off a glacier it is called “calving”.
Between 10,000 to 15,000 icebergs are calved each year.
When that chunk of ice floats in the water it is called an
iceberg.
Most glaciers are found in the polar regions of the world.
As the glaciers move across the ground they grind against the
earth and carves out valleys.
Large boulders can be frozen inside a glacier or pushed along by a glacier, and
moved many miles before it is dropped.
Glaciers cover about six million square miles of the Earth’s surface, but they
are melting at an alarming rate.
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There are animals, such a polar bears , seals and walruses that
use icebergs as a place to rest and hunt for food.
The Titanic sunk in the Atlantic Ocean because it hit a huge
iceberg.
* Approximately 10 percent of the Earth is covered by glaciers; during
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the last Ice Age, they covered one-third of the Earth’s surface.
Glacier ice is the largest reservoir of fresh water on the planet,
storing an estimated 75 percent of the world’s supply.
Glaciers are found in 47 countries.
A glacier can range in length from the equivalent of a football field
to more than 100 miles.
The Antarctic ice sheet is actually a glacier and has existed for at
least 40 million years. If it were to melt in its entirety, sea levels
would rise 210 feet worldwide, according to the U.S. Geological
Service.
Alaska is estimated to have more than 100,000 glaciers. Most remain
unnamed.
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* http://www.kidsgeo.com/geography-forkids/0149-lakes.php
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