Water World
Currents, Waves, Tides
The Water Cycle
The Ocean Floor
Freshwater
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
100
Where do most humans obtain their drinking water?
Lakes and Rivers
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?
200
An area where many small streams of water flow downhill to combine and end up in a "drainage basin"
watershed
300
What is an area where streams combine to flow down like a "drain".
A watershed
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
300
These form when the water table is above the Earth's surface
Lakes
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
400
These form in areas where the water table meets the Earth's surface
Natural Springs
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
500
What is an underground layer of rock and soil that contains water?
An aquifer
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