仁爱科普版八年级上册 Unit 4 Topic 1 What's the strongest animal on the farm？Section C 课件 (共18张PPT)

(共18张PPT)
Unit 4 Topic 1 Section C
教学目标
1. 能读懂关于热带雨林的文章，了解热带雨林的特征和重要性。
2.能根据要求自主获得信息和处理信息，如能判断文章体裁，找出文章的主旨大意等。
3.能理解文章的深层含义。
4. 能根据所学知识写一篇保护热带雨林的文章。
Protect Rainforests
what
why
how
Lead-in
Enjoy a video and answer the questions.
What's the video about
forests
rainforests
What other words can you think from rainforests
control
earth
cover
surface
thousands of
wood
lungs
animals
rainforests
['f r st]
['ren'f r st]
[w d]
[ θ]
['k v ]
['s f s]
['θa znd]
[l ]
Cover 6% of the earth’s surface
thick
[θ k]
[k n'trol]
Before-reading
Look at the pictures and predict (预测） which questions the passage can answer.
1.What are rainforests
2.How many animals are living in rainforests
3.Where do animals live in rainforests
4.What can we get from rainforests
5. Why are rainforests important to us
While- reading
1. Skimming
1. What genre （体裁）is the passage
It’s an___________.
A: exposition（说明文） B: narration（记叙文） C: argumentation（议论文） D: practical writing（应用文）
2. What is the passage about How do you know that
It's about the feature（特点）and importance of rainforests.
A
2.Scanning
(1)Read 1a quickly, and fill in the charts.
Feature of rainforests 1. _________ forests in the______ parts of the world.
2. __________ ground and always ________ and _____ in them.
3. ________ 6% of the earth’s________
4. give a home to __________and thousands of many beautiful _________ and ________.
Importance of rainforests
1. the________ of the earth, make the air_________ and _______________
2._______ the water and keep the water__________
3. ______________ the climate
4. keep the beauty of ________________
5.give us___________, _____________, fruit, ____________ and so on.
Why
thick
hot
wet
dark
hot
cover
surface
thousands
lungs
fresher
cleaner
hold
cycling
control
wood
food
medicine
plants
animals
nature
What
protect
[pr 't kt]
3.Close-reading
Look at the picture, answer the questions.
Why are rainforests becoming smaller and smaller
从巴西到印尼，热带雨林正在被砍伐，正在被烧毁，其速度非常之快，以致于到不了2050年，热带雨林就会被砍光烧光而从地球表面上彻底消失。
Rainforests are being cut and burned from Brazil to Indonesia at such a rate that they could well disappear from the earth's surface before the year 2050.
What would happen without rainforests ？
1. make the air fresher and cleaner.
2.hold the water and keep the water cycling.
3. control the climate.
4. keep the beauty of nature.
5.give us wood, food, fruit, medicine and so on.
6.give a home to many beautiful plants and animals.
1.the air pollution （污染）would become more and more serious.
2.very large increases in soil erosion, increases in flooding and in drought.水土流失现象大规模地增加了；水灾和旱灾大规模增加了
3.changes in rainfall patterns and regional, quite possibly global, changes in climate.降雨的方式改变了, 地区性的气候改变
4. A massive upsetting of ecosystems,各种生态系统的平衡均遭到大规模的破坏
5. Many beautiful plants and animals would die out.
importance
consequence（后果）
1.They provide places to live for thousands of plants and animals found nowhere else on Earth.
（2）Language points
2.Many of them live in the trees over 30 meters from the ground.
它们当中有许多居住在离地面三十多米高的树上。
它们为数千种动植物提供了生存场所，这些动植物是地球上其他地方所没有的。
作定语，修饰plants and animals
over=more than “多于，超过 ”
3. They play an important part in controlling the climate.
它们对调节气候起到了重要作用。
Play a part (in sth) ：（在某事中）起作用，参与（某事）”
Listen to the tape and read the passage aloud . Then fill in the blanks. Retell it in groups.
Rainforests are__________ [θ k] forests in the hot parts of the world. They________ 6% of the earth’s surface. Thousands ____animals live in rainforests. They are the _______(lung) of the earth. The plants in the forests help to make the air ______(fresh) and cleaner. They play an important part in __________(control) the climate . __________ rainforests ,many beautiful plants and animals would die out. Rainforests give us ________ [w d] , food, medicine and many more useful things. We need them for many _________. But now, rainforests are becoming smaller and smaller, so we should _________ [pr 't kt] them.
thick
cover
of
lungs
fresher
controling
Without
wood
reasons
protect
It will talk about how to protect rainforests.
After-reading
1.Can you guess what the next part of the passage will talk about ？
2. What should we do to protect rainforests
First, make posters , show and tell people about the importance of rainforests
Next, Do anything we can, such as using less paper and recycling (回收利用）books and paper. We never take wooden chopsticks when we buy take away food, and we don’t use paper napkins（纸巾）.
Finally, ask people not to cut down or burn forests.
Beginning:
Body:
Ending:
Summary: How to write a passage about protecting rainforests .
Rainforests are very important to us. We need rainforests for many reasons. However, they are becoming smaller and smaller, so we should protect them.
I hope we can play a part in doing these things. I believe our actions can make a difference and lead to a better future.
First, we can make posters , show and tell people about the importance of rainforests.
2. Next, we should do anything we can, such as using less paper and recycling (回收利用）books and paper. We never take wooden chopsticks when we buy take away food, and we don’t use paper napkins（纸巾）.
3. Finally, we can ask people not to cut down or burn forests.
Writing requirement（写作要求）
1.必须有首尾句。
2.能够说清楚保护热带雨林的行为。
3.能运用恰当的连接词等使句子流畅。
A组学生: Beginning、Body和Ending部分各 写一句,30词以上。
B组学生: Beginning和Body部分至少写两句，40词以上。
C组学生：Body部分至少写出三句，50-70词。
D组学生：Body部分至少写出四句，80词以上。
Peer-assessment(同伴互评)
评分表
内容 评分
1 有首尾句。 1 2 3
2 能够用所学句型表达清楚如何保护热带雨林。 1 2 3
3 书写规范，语法正确。 1 2 3
4 字数达到要求。 1 2 3
加分 有合适的链接词，能运用到本单元所学习到的词汇和句型等。 1 2 3
Rainforests
what
why
how
feature
importance
Beginning:
Body:
Ending：