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Ocean Water

Test Description: Reviews importance of oceans, how they were formed, and the properties of ocean water

Instructions: Answer all questions to get your test result.

1) About how much of Earth's surface is covered by ocean water?

A15% B30% C50% D71%

2) Which process on the early Earth first released most of the water that would eventually make the oceans?

Ameteorite impacts Bvolcanic activity Cerosion Dphotosynthesis

3) Where does the salt in salty ocean water come from?

Athe ocean floor Brocks on land that are eroded by running water Cthe atmosphere Dbyproducts of ocean wildlife

4) What is the number one factor that determines the type of organisms that can live in a body of water?

Asalinity Bdensity Ctemperature Damount of light

5) The earth's oceans contain about _______ percent salt.

A0.5 B35 C3.5 D0.35

6) How much salt is in freshwater?

Aabout 35% Babout 3.5% Cabout 5% Dless than 0.5%

7) Where on Earth is ocean water the most dense?

Aalong the Gulf Stream Bnear shorelines Cpoles Dsurface water at the tropics

8) How does salinity affect ocean water density?

ASalinity affects the density of water only in very cold polar areas. BHighly saline water is less dense than water with no salt in it. CSalinity has no influence on ocean water density because density is a fixed property of water. DThe more saline it is the more dense it is.

9) What type of water is most available for human use as drinking water?

Afreshwater in rivers and streams Batmospheric water Cocean water Dice and snow

10) How does ocean water temperature affect its movements?

AOcean water only moves once the temperature rises above 50 degees F. BWarm water circulates and cold water stays still CCold water rises DCold water sinks

*select an answer for all questions

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