3.2 Seawater Quiz

Which layer is the least dense?

• Teal (top)

• Blue (middle)

• Red (bottom)

Global ocean currents are a climate engine.

• True

• False

What amount of the ocean is salt?

• 97.5%

• 3.5%

• 89%

Why is it a big deal that ice floats?

• it cools the ocean

• it insulates the water from the cold air

• it isn't

• it protects animals from ships

Which is denser?

• saltwater

• freshwater

Which is denser?

• warm water

• cold water

Which will sink when mixed with the other?

• freshwater

• saltwater

Which will sink when mixed with the other?

• warm water

• cold water

Where do the salts in seawater come from?

• rain

• weathering of continental crust

• trenches

• its still unknown

An area where temperature drops quickly is called a(n)

• tempocline

• halocline

• pycnocline

• thermocline