Sec 1 geog unit 4 lesson 2
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The document provides information about global water distribution and sources. It discusses how most of Earth's water is salt water in oceans, while only 2.8% is fresh water. Of the fresh water, 1% is surface water in rivers and lakes, while most is stored as groundwater or ice caps and glaciers. Countries facing water shortages include some in Africa and South East Asia, where surface fresh water is more limited and groundwater is an important source for irrigation.
Sec 1 geog unit 4 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
Editor's Notes
- #2: http://www.youtube.com/watch?v=V87jNFJJ46o Water shortage malaysia 2014
- #6: Labelling a the oceans Exercise
- #8: Uses of water cartoon http://www.youtube.com/watch?v=On9WRrFHVjY
- #9: http://www.youtube.com/watch?v=AJn5Y65GAkA
- #12: 2 min vid on shrinking kilimanjaro ice caps http://www.youtube.com/watch?v=dCOa2lQiRbY
- #13: 2 min video on glacier retreat globally. http://www.youtube.com/watch?v=Pem4fpMwkSQ Pause at appropriate timing to illustrate the extent of the retreat
- #17: Coast Guard Ice Breaker video 3min Talk about the sheer size of the tankers -> the size of the lakes… http://www.youtube.com/watch?v=ZTd-sHL1TNU
- #19: Unit 4 ex 4