Transcript Deep Ocean Technology & The Ocean Floor

Deep Ocean Technology &
The Ocean Floor
IMPORTANT VOCAB
Continental margin
Continental shelf
Continental slope
Continental rise
Deep ocean basin
Abyssal plain
Mid-ocean ridges
Rift valley
Ocean trenches
Sea mounts
LET’S LABEL THE
DRAWING WITH
THE FOLLOWING
TERMS
PGS 86 -- 87
Vocabulary words
•The continental shelf is the gently sloping section of
the continental margin. The depth can reach 200 meters.
•The continental slope is steeply inclined section
between the continental shelf and the ocean floor.
•The continental rise is the base of continental slope,
made of piles of sediment.
•The abyssal plain is the broad, flat part of the ocean
floor.
•An ocean trench is a deep canyon on the ocean floor.
They form where one tectonic plate is pushed under
another.
Vocabulary continued
•A seamount is a volcanic mountain on the ocean floor.
•Guyot is a submarine volcanic mountain with a flat top.
•Islands are seamounts that rise above the water surface.
•The mid-ocean ridge is a mountain range that runs
through all the world’s oceans. It is almost 64,000
kilometers (40,000 miles) long! It forms where tectonic
plates pull apart. Magma erupts through the ocean floor to
make new seafloor. The magma hardens to create the
ridge.
•Rift valley is a long valley formed between the two sides
of mid-ocean ridges.
LABEL THE PICTURE WITH THESE PARTS:
Continental shelf, Continental slope, Continental rise, Abyssal plain, Mid-ocean
ridge, rift valley, ocean trenches, and seamounts
Continental
Continental
Continental
rise
Ocean
trench
Pgs 84 – 85, 88 – 89
TASK 1: List the 3 ways that
humans study the ocean floor?
Pgs 84 – 85
TASK 2: Make a flow map that
shows how SONAR works.
HOW DOES SONAR WORK
• Works like bats
• SOUNDWAVE (PING) is sent down,
towards bottom of ocean
• PING hits land.
• PING bounces back.
• Time it took for PING to hit something and
come back is recorded.
• Time is converted into a distance.
Mata Volcano pictures
Pgs 84 – 85
TASK 3: What are the 2 satellites
used to study the ocean floor and
what information do they give?
SATELLITE
 Satellite images cover more
territory than SONAR
Pgs 88 – 89
TASK 4: Explain the differences
between piloted vessels and
robotic vessels.
UNDERWATER VESSELS
• Piloted vessels are expensive and
more dangerous for humans in
the vessels.
• Robotic vessels are cheaper and
safer because humans control the
vessels from the surface of the
ocean.
ALVIN
TRIESTE