Seawater

A longshore bar is associated with which ocean basin region?

• coastal region

• shore

• beach

• shelf

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

• 71%
• 60%
• 83%
• 45%

Which ocean basin covers the largest percentage of the earth's surface?

• Indian Ocean
• Arctic Ocean
• Pacific Ocean
• Atlantic Ocean

The most abundant salt found in ocean water is

• sodium chloride (NaCl)
• calcium carbonate
• potassium chloride
• magnesium sulfate

While minerals constantly flow into an ocean, the ocean's salinity rises only very slowly. Where do most of the minerals go?

• Organisms take minerals from the seawater.

• Minerals settle out of the water, forming sediments.

• Minerals evaporate along with the water from the ocean.

Tags

NGSS.MS-LS2-3

Seawater temperature near the ocean bottom

• is much water near the Equator than near the North Pole.

• varies widely all over the world.

• varies little all over the world.

• is about the same as it is near the surface.

Tags

NGSS.MS-ESS2-6

Sound in seawater travels

• faster than in air.

• slower than in air.

• the same speed as in air.

• faster or slower than in air, depending on temperature.

Tags

NGSS.MS-PS4-2

Because clams, corals, and anemones are attached to or live on the bottom, we all them _____________ organisms.

• aphotic

• benthic

• pelagic

• abyssal

Which of the following elements is the main chemical building block of all living things?

• carbon

• hydrogen

• nitrogen

• oxygen

The oceans of the world are divided into four completely separate basins.

• False

• True