Download Unit 9 Day 1 Notes

Unit 9 Day 1 Notes
The Oceans
•There are
general hypotheses about the origin of
the Earth’s oceans
#1
•
and
the planet and release water
•Meteorites generally contain
that impact
water
#2
•
early in Earth’s history released
significant amounts of water vapor among the other
gasses to form the early atmosphere
VA SOL
•SOL 11
The student will investigate and understand
that oceans are complex, interactive physical,
, and biological systems and are subject to longand short-term variations. Key concepts include
a. physical and chemical changes (tides, waves, currents,
sea level and ice cap variations,
, and
variations).
Objective
1. Discuss the origin of the oceans and describe the
distribution of oceans and seas
2. Describe the composition of sea water and variations
in salinity concentrations
3. Explain ocean layering and effects of
4. Describe variations in
•The water vapor
and
to form the oceans
and ice caps
The Oceans
•Since prehistoric times man has utilized the worlds
oceans for
obtain
,
and to
•It wasn’t until the late 1800’s when the British
Distribution of Oceans
expedition was the first to use
sophisticated devices to study the oceans
•The oceans contain
Origin of the Oceans
•Several geologic clues indicate that the oceans have
existed
geologic history
of Earth’s water
Distribution of Oceans
of
•The other
is either locked up in
over the poles and in
and
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•The percentage of ice on Earth has varied by as much
•It borders North and South America to the west and
as 10 % over geologic time as periods of
climate alternated.
Europe and Africa to the east
The Major Oceans
and
•Sea Level is the level of the ocean’s surfaces and has
risen and fallen by
response to
and
in
glaciers
•The
is located mainly in the
.
•The
•The
is the
north of the arctic circle
(Southern Ocean) is the
region surrounding Antarctica
•
as a response to
tectonic activity will also affect sea level
•A
•Currently sea level is rising
causes a
per year in response to melting glaciers as the global
climate enters a
•
Seas
are smaller than oceans and are partly or
mostly
•The seas and oceans (with a few notable exceptions)
belong to one global ocean whose waters are
•The
is located between
The Major Oceans
•The oceans cover
of Earth’s surface. The
landmasses are like islands completely surrounded by
water.
•It was the first sea to be explored and mapped by
ancient peoples such as the
and
•The
•The oceans are really one vast,
body of water.
•
is the
contains about half of the Earth’s seawater
is located to the
southeast of North America
and
•The
separates Alaska and Siberia
•It borders North America to the East and Asia to the
West
•The
the arctic circle
is the
and extends from Antarctica to
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