Introduction to Oceanography

Multiple Choice

What percentage of the Earth is water?

• 20%

• 40%

• 50%

• 70%

Multiple Choice

What is another name for the surface zone of the ocean?

• Mixing Zone

• Special Zone

• Light Zone

• Auto Zone

Multiple Choice

During which tide would the water rise the highest?

• High Tide

• Low Tide

• Spring Tide

• Neap Tide

Multiple Choice

Which underwater volcano is active?

• Guyot

• Seamount

Multiple Choice

All of the following features of the ocean indicate tectonic activity except:

• abyssal plains

• mid

  ocean ridges

• seamounts

• trenches

Multiple Choice

When the sea floor spreads apart, volcanoes and ridges are formed because -

• sediments are deposited where the floor spreads,

  building ridges

• as the plates pull apart, magma moves to the surface,

  building ridges

• ocean water pushes down on the surrounding sea floor,

  pushing up ridges

• underwater earthquakes lift the sea floor into long ridges

Multiple Choice

Why is the surface temperature of the oceans more variable than the water near the ocean floor?

• Most energy is exchanged at the surface.

• B Most animals live near the surface.

• The water is less dense at the surface.

• The salt concentration is more variable at the surface.

Multiple Choice

Many species of the order Cetacea (whales, dolphins, and

porpoises) have become so scarce that they are now

protected by international law. Which of the following

probably did NOT contribute to the decline in these

populations?

• the

  whaling industry

• fishing nets

• ocean pollution

• increased carbon dioxide in the air

Multiple Choice

Seawater is typically denser than freshwater due to

seawater’s -

• higher salinity

• lower freezing point

• smaller mass

• greater depth