What Are the Oceans Like?

Oceans cover about _____ % of Earth's surface.

• 21%

• 50%

• 71%

• 91%

Which percentage of the Earth's water is fresh water?

• 1%

• 3%

• 50%

• 97%

Which of the following words does not name any ocean?

• Atlantic

• Indian

• European

• Pacific

What is salinity?

Salinity makes water...

• denser .

• less dense.

• clearer.

• darker.

The deeper the water, the ________ sunlight reaches to warm it, so the deeper the water, the ____________ water is.

Water pressure is the __________ of water _____________ against whatever it surrounds. The _______ water there is above us, the more _________ pressure there is.

Explain the importance of a submersible in helping scientists study the ocean.

Is the ocean floor flat?

• Yes

• No

Explain your answer to question 9.