WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found...

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WATER UNIT

Transcript of WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found...

Page 1: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.

WAT

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UNIT

Page 2: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.
Page 3: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.
Page 4: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.

WATER ON EARTH• Most of Earth's water—roughly 97 percent

—is salt water that is found in the oceans. • Only 3 percent is fresh water. • Of that 3 percent, about three quarters is

found in the huge masses of ice near the North and South Poles.

• A fraction more is found in the atmosphere.

• Most water in the atmosphere is invisible water vapor, the gaseous form of water.

• Less than 1 percent of the water on Earth is fresh water that is available for humans to use.

Page 5: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.

WATER TABLE

The surface of the water-saturated part of the ground.

Page 6: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.
Page 7: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.
Page 8: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.

AQUIFER

A porous deposit of rock, such as a sandstone, containing water that can be used to supply wells.

Page 9: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.
Page 10: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.
Page 11: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.
Page 12: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.
Page 13: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.

SONAR

Used to measure ocean depth.

Page 14: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.
Page 15: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.

WHY IS THE SEA SALTY?

The weathering and erosion of rocks in rivers carries sediment to the ocean.

Page 16: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.

What is the most abundant elements in seawater?

The substance you know as table salt—sodium chloride—is the salt present in the greatest amount in ocean water. NaCl

Page 17: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.

WHY DOES THE SALINITY OF THE OCEAN STAY CONSTANT?

As freshwater comes in through rivers, freshwater evaporates and freezes in glaciers.

Page 18: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.

Does temperature increase or decrease as you descend through the water column?

Temperature decreases as you descend through the water column and pressure increases.

Page 19: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.
Page 20: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.

CONTINENTAL SHELFA gently sloping, shallow area of the ocean floor that extends outward from the edge of a continent.

Page 21: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.

CONTINENTAL SLOPEThe true edge of a continent, where rock that makes up the continent stops and the rock of the ocean floor begins.

Page 22: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.

CONTINENTAL RISEAn underwater feature found between the continental slope and the abyssal plain.

Page 23: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.
Page 24: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.

MID-OCEAN RIDGEThe continuous chain of underwater mountains.

Page 25: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.

OCEAN TRENCHA deep canyon in the ocean floor.

Page 26: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.

ABYSSAL PLAINA nearly flat region of the ocean floor, covered with thick layers of

sediment.

Page 27: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.

SEAMOUNTA mountain rising from the ocean seafloor that does not reach to the water's surface.

Page 28: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.

CURRENTSWhat force cause surface currents?

Surface currents, which affect water to a depth of several hundred meters, are driven mainly by winds.

Page 29: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.

TIDESThe daily rise and fall of Earth's waters on shores.

Page 30: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.

What causes tides?Tides are caused by the gravitational pull of the moon and the sun.

Page 31: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.

SPRING TIDEA tide with the greatest

difference between high and low tide that occurs when the sun and the moon are aligned in a line with Earth.

Page 32: WATER UNIT. WATER ON EARTH Most of Earth's water—roughly 97 percent—is salt water that is found in the oceans. Only 3 percent is fresh water. Of that.

NEAP TIDEA tide with the least difference

between low and high tide that occurs when the sun and moon pull at right angles to each other.

http://oceanservice.noaa.gov/education/kits/tides/media/tide06a_450.gif