Deep Ocean Technology & The Ocean Floor

IMPORTANT VOCAB

Continental marginContinental shelfContinental slopeContinental rise

Deep ocean basinAbyssal plainMid-ocean ridgesRift valleyOcean trenchesSea 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

Continentalrise

ContinentalContinental

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