Desalination

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Lesson: 7-8

Page 31-32

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Lesson objectives:�

1. To practice listening strategies.
2. To learn and use new vocabulary.
3. Know more about desalination.

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What can you see in these pictures?�How is water being used?

Let’s Discuss, these questions

1. How often does it rain in the UAE?
2. Where does the UAE get its water from?
3. What do we use water for in towns and on farms?
4. How much water do you think the average person uses every day?
5. Is there enough water for everyone?
6. What ways do you think we waste water?
7. How can we save water?

Desalination plant

evaporation

rain

Solar power

Sustainable water supply

Let’s Watch and know: if Can Sea Water Desalination Save The World?

• https://www.youtube.com/watch?v=bfr82RB72U8

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sustainable water supply

Reverse osmosis

Fresh water

desalination plant

Evaporation

Solar power

Answers

1. Reverse osmosis:

Advantages: none

Disadvantages: uses a lot of power; expensive; high carbon emissions; increases salt levels in sea water

2. Heat evaporation:

Advantages: none

Disadvantages: uses the most power

3. Solar power:

Advantages: no carbon emissions; cheap

Disadvantages: none

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3

2

4

5

1 Actually; 2 Perhaps; 3 Maybe; 4 Actually; 5 Maybe; 6 Actually

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T

F

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F