Sec1 Geog Water Lesson 2

1. Chong Boon Secondary
Geography Department
Sec 1 Geography
Unit 4 Lesson 2
Water Supply:
Locations facing water shortage.

2. Thinking questions
• Where is water stored globally?
• What are countries that are facing
water shortages?

3. Lesson Objectives
• In this lesson, you will
–The global distribution of water.

4. Distribution of water on earth.
• 71% of earth’s surface is covered with water.
• Most of the earth’s water is salt water.
• 2.8% of the earth’s water is fresh water.
• 1% of the fresh water is surface water in rivers
and lakes.
• The total amount of easily obtained fresh
water is very little!

5. Oceans
• All the world’s oceans are
interconnected.
• This is divided into 5 main oceans.
1. Pacific Ocean
2. Atlantic Ocean
3. Indian Ocean
4. Arctic Ocean
5. Southern Ocean
Turn to
Pg 133

6. Name : ( ) Perserverance 1/2/3 Date:

7. Groundwater
• Groundwater is water stored
underground in soil and underlying rocks.
• Collected when rain infiltrates the
ground.
• Wells allow us to access groundwater.

9. Groundwater sources
• Most groundwater is found in Africa and
South America.
• South East Asia has a relatively large supply.
• Surface fresh water is more commonly used as
it is easier to access.
• Groundwater is commonly used for irrigation.
– 38% of water for irrigation is groundwater.

10. Ice caps & glaciers
• Ice cap is a continuous mass of
ice covering the top of mountains
and elevated areas.
• Glaciers are bodies of ice that
move down a slope due to
gravity.

11. Ice Cap

12. Glacier

13. Rivers
• Large natural stream of fresh water
• Flows along a definite course into another water
body.
• Starts at the source (upper stream)
• Ends at the mouth (into a water body)
• Tributaries are smaller rivers that feed the main
river.
• Distributaries are smaller rivers that discharge
water from the main river.

14. Let’s try a simple exercise
• Turn to Pg 137 of your textbook.

15. Lakes
• A body of water occupying a hollow in
the earth’s surface.
• The largest freshwater lakes by surface
area are the Great Lakes of North
America.
• Pg 138

16. Great Lakes of North America

17. Summary
Are you now able to
• The distribution of water?

18. Let’s do a
summary exercise