Ocean Water

Choose the words that best complete the sentence:

Ocean surface currents are caused by _____, and deep ocean currents are caused by _____.

• density differences; wind

• wind; density differences

• tides; solar radiation

• solar radiation; tides

Tags

NGSS.MS-ESS2-6

What is the primary cause of deep currents in the ocean?

• the Coriolis effect

• density differences in ocean water

• upwellings

• winds

Tags

NGSS.MS-ESS2-6

Where does most of the heat in the ocean water come from?

• marine organisms

• collisions between dissolved solids

• solar energy

• tides

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS2-6

Ocean water contains microorganisms, gases, and minerals. Which of these are dissolved in the water?

• minerals only

• microorganisms only

• microorganisms and gases

• minerals and gases

The density of ocean water is affected by temperature and ______________.

• salinity

• warmth

Which one of these increases as a submarine dives deeper into the ocean?

• the number of plants in the water

• the freshness of the water

• the water temperature

• the water pressure

What is true about the water on the bottom of the ocean?

•  It is the saltiest water found in the ocean

• It is the densest water found in the ocean

•  It is not frozen because sunlight warms it up

•  It does not move

The pie chart shows the percentage of each dissolved gas in ocean water. Which of the following gases is dissolved in ocean water at the highest rate?

• carbon dioxide

• oxygen

• nitrogen

• other gases

Which of the following does NOT affect the movement of ocean water?

• wind

• density

• abundance of phytoplankton

• tides

Tags

NGSS.MS-ESS2-6

Which of the following is NOT true about water in upwelling?

• it's nutrient-rich

• it's warm

• it's cold

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS2-6