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This
NOVA
television
broadcast
examines
the
rare
'supertwister',
an
extreme
tornado
classed
F4
or
F5
on
the
Fujita
scale.
Two
storms
are
discussed:
the
1999
Oklahoma
City
tornado
(F5)
and
the
2002
LaPlata,
Maryland
tornado
(F4).
Articles
discuss
the
seemingly
high
incidence
of
tornadoes
in
the
United
States
and
the
development
of
tornado
forecasting.
There
is
also
an
audio
feature
on
storm
tracking,
...
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Choosing & Using this resource...
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Sedimentary, igneous and metamorphic rocks, weathering, erosion and transport, and the rock cycle are explained in this resource for students through written content, interactive content, audio, video and games. A multiple choice test is included. Students may score their tests and the correct responses will be given.
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Choosing & Using this resource...
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This
Gallery
offers
an
extensive
selection
of
images,
sound
recordings,
animations,
and
movies
associated
with
the
National
Oceanic
and
Atmospheric
Administration's
expeditions.
A
set
of
links
provides
access
to
maps,
photos
of
ocean-dwelling
organisms,
sound
recordings,
cultural
and
historic
illustrations,
research
technology
such
as
ships
and
submersibles,
and
photos
of
ocean
explorers
themselves.
...
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Choosing & Using this resource...
Related resources and collections
This resource is part of :
This resource is included in the following collections:
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