Oceanography Test 1 Review

Front

What is the average depth of the oceans?

Back

2.3 miles (3.65 kilometers)

Front

Who proposed the theory of Sea-Floor Spreading?

Back

Harry Hess

Front

What percentage of the Earth's surface is covered by oceans?

Back

70%.

Front

What is the deepest part of the ocean?

Back

Marianas Trench

Front

Define Sea-Floor Spreading.

Back

A geological process where new oceanic crust is formed at mid-ocean ridges and older crust is pushed away.

Front

What is the significance of the Marianas Trench?

Back

It is the deepest known point in the Earth's seabed.

Front

What is the average temperature of ocean water?

Back

Approximately 39°F (4°C) in deep ocean waters.

Front

Explain the concept of ocean currents.

Back

Large-scale movements of water within the world's oceans, driven by factors such as wind, temperature, and salinity.

Front

What is the role of phytoplankton in the ocean ecosystem?

Back

They are primary producers that convert sunlight into energy through photosynthesis.

Front

What is the continental shelf?

Back

The underwater landmass that extends from a continent, resulting in relatively shallow water.