Exploring the Ocean

Ocean water freezes at a _____ temperature than fresh water.

• lower

• higher

What is a volcanic mountain that forms near a mid-ocean ridge?

• abyssal plain

• seamount

• continental slope

• mid-ocean ridge

Tags

NGSS.MS-ESS2-3

A gently sloping continental _____ extends from the edge of each continent.

• ridge

• trench

• shelf

• slope

How does the density of freshwater compare to the density of salt water?

• lower

• higher

• the same

What happens to the water temperature as you go deeper below the ocean surface?

• increases

• decreases

• stays the same

How much sodium chloride and other salts are dissolved in a water sample is the water's _____.

• density

• pressure

• microbe level

• salinity

Old ocean floor sinks toward the mantle at _____.

• an abyssal plain

• a trench

• a continental shelf

• a mid-ocean ridge

Tags

NGSS.MS-ESS2-3

What is a smooth, nearly flat region of the ocean floor?

• a trench

• a continental ridge

• a mid-ocean slope

• an abyssal plain

Scientists use _____, a form of technology that uses sound waves, to help them map the ocean floor.

• sonar

• radar

• echocardiogram

• fluoroscope

Tags

NGSS.MS-PS4-2

Water _____ increases with depth in the ocean because the weight of the water above increases.

• pressure

• temperature

• salinity

• microbes