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This
site
is
part
of
Visible
Earth,
which
is
hosted
by
the
National
Aeronautics
and
Space
Administration
(NASA),
and
contains
a
searchable
directory
of
images,
visualizations,
and
animations
of
the
Earth.
This
section
pertains
to
the
cryosphere,
which
covers
sea
ice,
ice
flows,
ice
growth,
icebergs,
glaciers,
snow
cover,
and
ice
sheets.
Each
image
is
available
in
a
variety
of
resolutions
and
sizes,
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This
lesson
plan
is
part
of
the
DiscoverySchool.com
lesson
plan
library
for
grades
6-8.
It
focuses
on
icebergs
and
water
salinity,
as
well
as
the
environment
of
the
continent
of
Antarctica.
Students
research
this
area
and
do
an
experiment
demonstrating
the
relationship
between
water
salinity
and
ice
floating
or
sinking
in
the
ocean.
Included
are
objectives,
materials,
procedures,
discussion
questions,
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Choosing & Using this resource...
Educational standards associated with this resource:
National Science Education Standards (NSES): Read
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In
this
exercise,
students
investigate
the
mechanism
for
the
isostatic
support
of
mountains.
Introductory
materials
explain
the
Archimedes
principle
(the
weight
of
a
floating
solid
is
supported
by
the
weight
of
the
fluid
that
it
displaces)
and
the
concept
of
depth
of
compensation
(the
depth
within
a
fluid
where
the
pressures
generated
by
overlying
material
are
everywhere
equal),
and
graphically
display
...
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This
lithograph
shows
the
break-off
of
a
large
iceberg
from
the
Pine
Island
Glacier
in
West
Antarctica.
This
event
occurred
between
November
4th
and
12th,
2001,
and
provides
powerful
evidence
of
rapid
changes
underway
in
this
area
of
Antarctica.
The
three
images
presented
were
acquired
by
the
vertical-viewing
(nadir)
camera
of
the
Multi-angle
Imaging
SpectroRadiometer
(MISR)
instrument
aboard
NASA's
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The
National
Snow
and
Ice
Data
Center
(NSIDC)
is
an
information
and
referral
center
supporting
polar
and
cryospheric
research.
Through
its
Data
Catalog,
NSIDC
archives
and
distributes
digital
and
analog
data
on
snow
cover,
avalanches,
glaciers,
ice
sheets,
freshwater
ice,
sea
ice,
ground
ice,
permafrost,
atmospheric
ice,
paleoglaciology,
and
ice
cores.
Users
may
browse
their
entire
data
collection
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C-19
iceberg
that
calved
off
the
Ross
Ice
shelf
and
its
companion
B-15
iceberg,
which
is
anchored
near
the
coast.
The
two
large
bergs
may
have
disrupted
normal
ocean
circulation
that
clears
the
Ross
Sea
of
seasonal
ice
during
the
first
months
of
austral
summer.
The
ice
remained
in
the
sea
long
past
previous
thaw
dates,
and
created
trouble
for
ships
trying
to
bring
in
supplies
to
McMurdo
research
station
...
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This news article examines evidence that parts of the Antarctic ice sheet have undergone episodes of instability that appear to correspond with periods of unusually warm temperatures in the Northern Hemisphere during the last ice age.
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NOAA's many educational activities are distributed across the agency. This site has been designed to help students, teachers, librarians and the general public access the many educational activities, publications, and booklets that have been produced.
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Choosing & Using this resource...
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In
this
resource,
students
will
discover
that
there
are
notable
differences
between
sea
ice
and
fresh-water
ice,
such
as
density.
In
on
segment,
students
learn
that
the
first
sign
of
freezing
on
the
sea
is
an
oily
appearance
of
the
water
caused
by
the
formation
of
needle-like
crystals.
The
site
explains
the
relationship
between
growth
and
the
rate
at
which
heat
flows
from
the
water
and
that
the
ice
...
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Choosing & Using this resource...
Educational standards associated with this resource:
National Science Education Standards (NSES): Read
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This database of imagery houses a large collection of satellite images capturing some of the more important weather and environmental events of the last 30 years. Users can access images of many types of storms, fires and smoke, floods, weather fronts, ocean and sea surface phenomena, and snow cover.
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