Oceanography Questions

This is a sonar device that scans the seabed on either side. It is towed along by a surface ship.

This is lowered to the sea bottom, where its nets collect samples of sea animals. It also carries a camera.

This is another massive ridge system. It marks where two plates meet in the Pacific.

By what interval does pressure increase by as you go deeper in the ocean?

These surveyed the oceans, measuring surface temperature and wave height, picking out current patterns, and monitoring ocean pollution.

The rocks of this layer of Earth are dense and solid.

South of Australia, the seafloor drops away to form a deep basin, then gradually rises toward Antarctica.

These are cracks in the Earth's crust caused by the movement of plates.

The rocks of this layer of Earth are partly melted and flow like thick syrup.

This trench, situated along the western coast of South America, is about 11,800 miles long.

This contains the deepest point on Earth, the Challenger Deep, which plunges to 35,827ft.

These are large mountains, usually formed by volcanic activity, which can rise steeply from the seafloor.

Stretching over 1,700 miles, this ridge gets its name because it is situated on longitude 90 degrees east.

Many of the Pacific Islands are made of these.

Made of tiny volcanic islands. Filled with brightly colored fish, sharks, and coral. Off the northeast coast of Australia. Largest natural feature on Earth and is visible from space.

One of the few island groups in the eastern Pacific. Six main islands which are inhabited by unique wildlife.

This is part of a gigantic series of trenches stretching into the western Pacific.

These occur where a large river deposits sediment in the sea at the edge of a continent.

Twice the size of atlantic. covers 1/3 of the globe.

7 million years ago, this basin was cut off from the Atlantic Ocean and dried up. The age of rocks suggest that this has happened multiple times.