7.4 Exploring the Ocean

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

• salinity
• composition

Ocean water freezes at a lower temperature than fresh water.

• True
• False

Freshwater has a higher density than salt water. 

• True
• False

A gently sloping continental slope expands from the edge of each continent.

• True
• False

A seamount is a volcanic mountain that forms near a mid-ocean ridge. 

• True
• False

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

• Sonar
• Wifi

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

• temperature
• pressure

Old ocean floor sinks toward the mantle at a(n) ______________.

• mid-ocean ridge
• trench

The ___________ plain is a smooth, nearly flat region of the ocean floor.

• abyssal
• flat

What is the largest ocean?

• Atlantic

• Pacific

• Indian

• Arctic