Earth’s Water

Lesson 1

How is water distributed on the

Earth?

_______of the world’s Water supply is ocean (salt water).

_______of the world’s water supply is frozen in icecaps and glaciers.

How is water distributed on the Earth?

________ of the world’s water supply is non-consumable water on land.

_______ of the world’s water supply is freshwater available for consumption.

World’s Oceans

Can you name the five world

oceans?

World’s Oceans

Atlantic

Pacific

Indian

Arctic

Southern

Pacific Ocean

• The largest ocean. It is larger

than all the land put together.

• It contains 48% of the world’s

seawater.

• The deepest ocean because the

Mariana Trench is located in it. (over

36,000 feet deep)

Atlantic Ocean

• The second largest ocean.

• It contains 23% of the world’s

seawater.

• Most traveled ocean

routes.

Indian Ocean

• The warmest ocean.

• It contains 40% of the world’s

oil production.

Arctic Ocean

• The smallest ocean.

• It is covered by drifting ice.

Southern Ocean

• The newest ocean.

• Recognized in 2000.

• It contains icebergs and deep

continental shelves.

I can do a nine __________ __________

Daily Anagram #2 11/11

World’s Freshwater

Groundwater: water that collects between bits of rock and soil.

What factors affect the groundwater?

(Globe – pp. 210)

How does groundwater reach

the Earth’s surface?

Water may reach the surface through wells, springs, or geysers.

What is the main difference between a spring and a geyser?

(Globe – p. 212)

What is the difference between

a river and a lake or pond?

Rivers or streams are running

water.

Lakes or ponds are still water.

90% of the continental surface

water is found in lakes.

What is the difference

between a gulf and a sea?

A sea is a smaller body of water connected to or near an ocean.

A gulf is a large area of ocean reaching into the land.

Ocean Properties

1. What is the first characteristic

that you notice about ocean

water?

Salinity is the amount of dissolved salts in ocean water.

Fresh water from rivers, precipitation and glaciers will lower the salinity of the water.

Evaporation during the day will cause the salinity to rise.

Sodium chloride

(NaCl) is the main

mineral in ocean

water. Most of the

minerals come from

the weathering of

rocks on land. Rivers

bring the minerals to

the ocean.

2. Temperature layers

The ocean can be divided into three

layers based on temperature.

A. Surface: Sun heats this layer.

Constant winds and waves keep

it circulating so little temperature

variation within layer.

2. Temperature layers

B. Thermocline: Temperature

drops sharply with depth. Drops

faster than in other two layers.

300-700 meters below sea level.

C. Deep: Average temperature is 2

degrees Celsius.

3. Water Pressure

Water pressure increases as depth

increases.

Water weighs more than air.