the hydrosphere
DESCRIPTION
The hydrosphere: rivers, tides, ocean currents and waves.TRANSCRIPT
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*The hydrosphere
The hydrosphere is the
sphere of water that
surrounds our planet. In
Latin, “hydro” means
water.
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Hydrosphere
Oceanic waters
Oceans Seas
Contintental waters
Rivers Lakes Icebergs Underground water
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The hydrosphere is always moving: the water
cycle
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The hydrosphere is always moving
Rivers: they have an
important job. They
drain the landscape,
and move water, and
minerals towards the
Earth’s oceans.
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The hydrosphere is always moving
Seas and oceans: they move because of three
phenomena: waves, currents and tides.
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The hydrosphere is always moving
The surface of the
Earth’s oceans are
is in constant
motion, moving up
and down, in the
form of waves.
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The hydrosphere is always moving
There are a number
of ocean currents
around the Earth. A
current is like a vast
river within the
ocean, flowing from
one place to another.
These currents are caused
by differences in
temperature, differences in
salinity, and by wind.
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The hydrosphere is always movingBut the most important
factor moving water across
the ocean are tides. Tides
are caused by the Sun and
the gravity of the Moon.
Tides cause water levels to
rise and fall every six hours
approximately.