Water World
Currents, Waves, Tides
The Water Cycle
The Ocean Floor
100

The percent of Earth's surface covered by water.

71%

100
The most common salt in ocean water
Sodium chloride
100
What is the driving force of the water cycle?
The sun
100
Technology that was first used to map the ocean floor
SONAR
200

The largest ocean.

Pacific Ocean

200
The amount of dissolved solids in a liquid.
salinity
200
Where does most water vapor in the air come from?
Evaporation from oceans
200
Mountain chains formed by magma coming through rift zones.
What are mid-ocean ridges?
300

How much of the Earth is covered in saltwater?

75%

300
Waves and currents are caused by this
wind
300
What are droplets that fall back to the Earth's surface?
Precipitation
300
It is a large flat area covered by mud and the remains of tiny marine organisms.
the abyssal plain
400

Where is most of the Earth's freshwater located?

Glaciers and polar ice caps (frozen water)

400
What are tides caused by?
The gravitational pull of the moon and the sun
400

What stage of the water cycle occurs when water vapor gas cools and turns to liquid water?

condensation

400
Subduction zones form these, and they are the deepest places on the Earth.
ocean trenches
500

Of all the Earth's waters -salt water and freshwater combined, about what percentage is ocean water?

97%

500

Water temperature __________ as depth increases

decreases

500
How is dew formed?
Condensation
500
When an underwater volcano forms above the surface of the water, it forms this.
Volcanic island
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