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

•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.

•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

TASK 1: List the 3 ways that humans study the ocean floor?

TASK 2: Make a flow map that shows how SONAR works.

• 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

TASK 3: What are the 2 satellites used to study the ocean floor and what information do they give?


Satellite images cover more territory than SONAR

TASK 4: Explain the differences between piloted vessels and robotic 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.