Earth Science- Oceans

Which of the following is NOT a process that decreases the salinity of seawater?

• runoff from land

• icebergs melting

• precipitation

• evaporation

Which of the following structures is built to protect boats from large breaking waves?

• jetty

• groin

• breakwater

• seawall

Density currents move ____.

• horizontally

• vertically

• from north to south

• from south to north

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

• 50 percent

• 30 percent

• 70 percent

• 40 percent

Which of the following is NOT associated with upwelling?

• increased nutrients at the ocean surface

• increased plankton population

• vertical water movements

• horizontal water movements

What is true about an ocean current that is moving toward the equator?

• It is warm.

• It is fast.

• It is cold.

• It is slow.

The gently sloping submerged surface extending from the shoreline toward the deep ocean is called ____.

• continental shelf

• continental slope

• continental rise

• submarine canyon

The accumulation of sediment found along the shore of a lake or ocean is called a ____.

• neap tide

• longshore current

• beach

• sea arch

What is the principal source of dissolved substances in the oceans?

• weathering

• infiltration

• outgassing

• evaporation

What is the most abundant salt in the sea?

• calcium chloride

• magnesium chloride

• potassium chloride

• sodium chloride