1. Nuture's nursery: estuaries
Unit 13
Integrating Skills
Nuture's nursery: estuaries o

2. Skimming
Find the definition of an estuary
An estuary is the body of water where a river meets the ocean. Salt water from the ocean and fresh water from the river mix together in an estuary. This mixing of fresh and salt water creates a unique environment filled with life of all kinds－a zone between the land and sea.

3. 1. the estuaries are our planet's nurseries.
Look through the passage and find out what kinds of function or significance of estuaries have been mentioned ? (Topic Sentences )
1. the estuaries are our planet's nurseries.
2. Great places for nature’s young animals .
3. Clean our water by absorbing nutrients and
pollutants from water coming from inland sources
4. Provide both recreation and education for human
beings.
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5.Contribute to the economy through tourism and fishing

4. Reading
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5. (1)Why are estuaries such good places for nature’s young one?
Reading: Questions
(1)Why are estuaries such good places for nature’s young one?
(2)What does density mean in this passage?
(3)How do estuaries affect the water that passes through them?
(4)Why are estuaries more sensitive to pollution than other areas?
(5)Why are estuaries important to human beings?
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6. 1. Why are estuaries such good places for nature’s young ones?
Read the passage and answer the following questions.
1. Why are estuaries such good places for nature’s young ones?
In estuaries, animals can enjoy all the benefits of the oceans without having to face many of its dangers.
Tides provide energy for the ecosystems, but estuaries are protected from waves and storms by islands, mud or sand.
Nutrients from both the land and the ocean arrive in estuaries.

7. 2. What does density mean in this passage?
It means the number of species per area.
3. How do you estuaries affect the water that passes through them?
They absorb nutrients and pollutants from water coming inland sources, thus cleaning our water.
4. Why are estuaries more sensitive to pollution than other areas?
Because estuaries act as filters(过滤器), many pollutants end up in them.

8. 5. Why are estuaries important to human beings?
Estuaries provide both recreation and education for human beings.
People can fish, swim and have fun on the beach.
Scientists and students have endless opportunities to study a variety of life in the habitat.
Estuaries also contribute to the economy through tourism and fishing.

9. Fill in
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10. Finish the following passage with words from the text.
Estuaries are bodies of water along coasts that are ________ (形成) when fresh water from rivers flows into and ________ with salt water from the ocean. In estuaries, the fresh river water is blocked from streaming into the open ocean by either surrounding mainland, or islands. This mixing of fresh and salt water _______ a unique environment ______ with life of all kinds — a zone between the land and sea known as an estuary.
formed
mixes
creates
filled

11. variety habitat absorbing entertainment
The estuary gathers and holds a ________ of life－giving nutrients from the land and from the ocean, forming an ecosystem that contains more creatures than any other ________ on the earth. Estuaries are also important for human beings. They protect water quality by ________ pollutants from water coming from inland sources. They are centers for ________________ (娱乐) and education. Estuaries, in short, are treasures.
variety
habitat
absorbing
entertainment

12. Writing

13. Topic: ________________
What will happen to a piece of metal if you put it in water?
Topic: ________________
Step 1:
Step 2:
Step 3:
Describe what happens
Describe the causes and effects
The conclusion

14. Sample writing: If a piece of metal,or any other object
is put in water ,it will dissolve. Because
the water molecule is made up of one oxygen
and two hydrogen atoms. It is polar,that is,
it has a slightly negative and a slightly positive
end. The two ends make it possible for water
to break down both solids and gases. So
a piece of metal will dissolve when it is put in
water .

15. Tips
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16. Tip 1 You should explain each step in the order it happens.
If you are describing a process,
You should explain each step in the order it happens.
Tell the readers about the causes and effects and use words like first, second, then, etc to show the order of the steps.
First…
Second…
Third/ Then…
Last…

17. Tip 2 What is it ? How many parts is it made up of?
If you are writing about something that has several parts, describe each part and explain its function and structure.
The following questions may help:
What is it ? How many parts is it made up of?
What‘s the structure of each part? How does it work?
What’s the function of the thing?

18. 书面表达 现在越来越多的人购买小汽车。假设你叫李立，请你根据下面所给信息给报社编辑写一封信发表观点。字数：100 左右。
优点：有了小汽车，能自由来去，不用花很多时间；小汽车对于旅行比较舒适；开小汽车比自行车安全。
缺点：越来越多的小汽车会引起污染、交通堵塞和更多的交通事故。
建议：政府要适当控制小汽车的数量，使我们有一个洁净、安静的环境。
生词： 堵塞 jams 环境 environment

19. Dear editor,
Nowadays in our city, more and more people own cars. I think there are good reasons for owning a car. First, with a car a person can get around freely, without spending a lot of time. Second, a car is comfortable to travel in. Finally, it is safer to drive a car than a bicycle.
However, I am afraid more and more cars will cause air pollution. What’s more, more and more traffic jams and accidents are happening every day.
Personally, I hope the government should control the number of cars to let us have a clean and quiet environment.
Yours
Li li

20. Bye-bye
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