Science 1087 Unit 3

Midnight zone

Completely dark, The water in this zone is just above frezzing

The Mid Atlantic Ridge?

A volcanic ridge of underwater mountain in the middle of the Atlantic Ocean

The Twilight zone

Has a dim light at the top and no light at the bottom

The continental rise

The area where the ocean floor gently slopes and begins to level out.

What is the deepest ocean bottom called?

1. Abyss 2. Abyssal plain

The 5 things that help mix air containing oxygen into ocean water?

1. Air pressure 2.Wind 3.Waves splashes 4. Sea plant giving of oxygen from photosynthesis 5. Surface disturbance

4 things that make the twilight zone and lower depths inviting places

1. Crusing Pressure 2. Darkness 3. Extreme Cold 4. Lack of oxygen

The three island groups that are examples of mountains that project above the ocean surface

1. The Philippines 2. Polynesia 3. Hawaii 4. Indonesia

Swells

Are long low waves that move over the oceans surface sometimes great distances, until they reach a land mass

Why does the earth appear blue?

Because of the hydrosphere

What does Sonar equipment do?

Sends sound waves from a transmitter on a ship to the ocean bottom and counts the time an echo takes to return to the ship

Continental Shelf

The point where the ocean water suddenly becomes much deeper