Ocean Quiz

Approximately how much of Earth's surface is covered by water?

• 50 percent

• 30 percent

• 70 percent

• 40 percent

The largest of Earth's oceans is the ____________.

• Pacific

• Atlantic

• Indian

• Arctic

Which of the following is NOT considered to be one of the four major oceans?

• Atlantic

• Pacific

• Indian

• Polar

Underwater volcanic mountains on the ocean floor are called _______________.

• seamounts

• ridges

• nodules

• plateaus

Which of the following is true about deep ocean trenches?

• They are the highest points of the ocean

• They occur at subduction zones

• They occur at transform boundaries

• They occur at divergent boundaries

What technology do scientists use to measure ocean depth?

• Sonar

• snorkeling

• lasers

• seismographs

The relatively shallow, gently sloping submerged surface extending from the shoreline toward the ocean is called the ___________.

• continental shelf

• continental rise

• continental slope

• submarine canyon

What is the deepest topographic feature of the ocean?

• ridge

• rift

• trench

• seamount

Where does seafloor spreading occur?

• at convergent plates

• on seamounts

• near the ocean surface

• at divergent plate boundaries

The highest salinity would be found in which of the following areas?

• an area with high rates of precipitation

• an area with high rates of evaporation

• an area with high rates of runoff

• all of the above