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The
Moon's
gravity
imparts
tremendous
energy
to
the
Earth,
raising
tides
throughout
the
global
oceans.
What
happens
to
all
this
energy?
Scientists
studying
data
from
the
orbiting
TOPEX/
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Choosing & Using this resource...
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To
gather
long-term
information
about
the
world's
oceans
and
currents,
orbiting
instruments
must
take
extremely
precise
measurements
of
the
height
of
the
ocean
surface.
Ocean
surface
topography
data
contains
information
that
has
significant
practical
applications
in
such
areas
as
the
study
of
worldwide
weather
and
climate
patterns,
the
monitoring
of
shoreline
evolution,
and
the
protection
of
ocean
...
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Choosing & Using this resource...
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The Exploratorium digital library includes digital media, digitized museum materials related to interactive exhibits and scientific phenomena.
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Choosing & Using this resource...
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This is a group of frequently asked questions and answers about Earth's magnetic field and poles, the magnetic compass, magnetic reversals, and geomagnetic models. Links to maps and illustrations are embedded in the text.
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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
web
page
enables
the
user
to
plot
a
map
of
current
or
historic
climate
data
for
the
United
States
using
datasets
provided
by
the
National
Climatic
Data
Center.
Users
may
choose
among
three
types
of
variables
(precipitation,
temperature,
and
Palmer
drought
severity
index),
a
variety
of
types
of
plots,
and
a
range
of
dates
from
the
present
as
far
back
as
1895.
Links
to
other
sites,
datasets
and
...
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Choosing & Using this resource...
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During
most
of
the
last
one
billion
years
the
globe
had
no
permanent
ice.
However,
sometimes
large
areas
of
the
globe
were
covered
with
vast
ice
sheets.
Users
can
read
and
view
pictures
which
help
explain
what
ice
ages
are,
when
they
occurred,
and
why
they
occur.
This
site,
sponsored
by
the
Illinois
State
Museum,
has
links
to
web
pages
on
paleontology
of
the
midwestern
United
States
during
the
last
...
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Choosing & Using this resource...
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This
resource
presents
information
on
global
warming
and
the
possible
impacts
of
the
melting
of
the
Antarctic
ice
sheets
and
the
resulting
rise
in
sea
level.
Materials
include
a
video
excerpt,
interviews
with
proponents
and
skeptics
on
the
issue
of
global
warming,
maps
and
descriptions
of
how
the
world's
coastlines
might
change
as
sea
levels
rise,
and
the
study
of
ice
cores
to
reveal
climatic
conditions
...
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Choosing & Using this resource...
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NASA's
Visible
Earth
is
a
searchable
directory
of
images,
visualizations,
and
animations
of
the
Earth.
The
images
are
also
listed
under
the
following
categories:
agriculture,
atmosphere,
biosphere,
cryosphere,
human
dimensions,
hydrosphere,
land
surface,
oceans,
radiance
or
imagery,
solid
earth,
locations,
and
satellites.
Accompanying
each
image
are
credits,
data
about
the
image,
the
satellite
it
...
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Choosing & Using this resource...
Comments and Teaching Tips
Read (2)
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