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EXPLORING THE OCEAN. LEARNING ABOUT THE OCEAN: Trading route Scientific Discoveries Exploring the ocean floor Sonar- floor mapping. EXPLORING THE OCEAN. FEATURES OF THE OCEAN FLOOR: - continental shelf - continental slope - abyssal plain - mid-ocean ridge - map on page 180-181.

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exploring the ocean

EXPLORING THE OCEAN

LEARNING ABOUT THE OCEAN:

Trading route

Scientific Discoveries

Exploring the ocean floor

Sonar- floor mapping

exploring the ocean1

EXPLORING THE OCEAN

FEATURES OF THE OCEAN FLOOR:

- continental shelf

- continental slope

- abyssal plain

- mid-ocean ridge

- map on page 180-181

features of the ocean floor cont

FEATURES OF THE OCEAN FLOOR (cont.)

Shallow water:

Continental shelf: extends from the edge of the continent outward to where the bottom sharply drops off onto a steep slope.

Continental slope: the steep incline between the continental shelf and the abyssal plain.

features of the ocean floor cont1

FEATURES OF THE OCEAN FLOOR (cont.)

Open ocean:

abyssal plain: mostly flat portion of ocean floor which provides a home to a variety of unique organisms that are adapted to the extreme conditions of this habitat.

mid-ocean ridge: A chain of undersea mountains that circles the earth through every ocean.

seamount: a volcanic peak that rises at least 3280 feet (1000m) from the seafloor. Completely under water.

features of the ocean floor cont2

FEATURES OF THE OCEAN FLOOR (cont.)

3. Deepest depths:

a. ocean trench: the deepest parts of the ocean.

- the deepest one is the Marianas

trench (South Pacific)

b. hydrothermal vents: an opening in the sea floor where super-heated water and other material are discharged into

the surrounding seawater.

exploring the ocean2

EXPLORING THE OCEAN

MOVEMENTS OF THE OCEAN FLOOR:

1. Layers inside Earth:

a. outer layer – crust

b.between crust and core – Mantle

c. center - Core

2. Earth’s plates:

a. plates: solid rock that makes up Earth’s upper layer /crust

- 14 major plates

movements of the ocean floor cont

MOVEMENTS OF THE OCEAN FLOOR: (cont.)

3. plates moving apart:

a. seafloor spreading: a process by which new rock is added to the ocean floor along the boundary between diverging plates.

4. plates moving together:

- involves one plate sinking under another.

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