Unit 1 Nature in the balance Welcome to the unit & Reading 课件(共18张PPT，内镶嵌视频) 译林版（2019）必修第三册

(共18张PPT)
Unit 1 Nature in the balance
Welcome to the unit & Reading(I)
Let us know, however, flatter ourselves overmuch on account of our human victories over nature. For each such victory nature takes its revenge on us.
—— Friedrich Engels
但是我们不要过分陶醉于我们人类对自然界的胜利。对于每一次这样的胜利，自然界都对我们进行报复。
——弗里德里希·恩格斯
Watch the video about human and nature. Work in pairs. Share how you feel about the world we’re living in.
The human race has done much harm.
We have polluted our soils and seas,
And cut down too many trees.
Now is the time to sound the alarm.
We want to live in a world that’s clean;
We want to live in a world of green.
The human race has done much harm;
Now is the time to sound the alarm.
What are the rhyming words in this song
Let’s be thankful for the skies above;
Let’s plant new trees and stop pollution;
Let’s work together to find the solution;
The Earth’s our home to protect and love.
We want to live in a world that’s clean;
We want to live in a world of green.
Let’s be thankful for the skies above;
The Earth’s our home to protect and love.
Discuss the following questions in pairs.
1. What is the message of the song
2. What can you do to help protect the environment
Humans have done much harm to the Earth, and we have to take action to change this situation.
We can use less paper and fewer plastic bottles and bags. Cutting down on electricity usage can also help reduce the air pollution that power stations create.
Pre-reading
The Amazon rainforest:
a natural treasure
What do you think this script is about
While-reading
Match the main idea of each paragraph.
Para 1
Para2
Para3
Para4
Para5
Basic information about the rainforest
The rainforest’s value to the human race; threats to the
rainforest
Introduction to the Amazon rainforest
Plant biodiversity：levels of the rainforest（plants）
Animal biodiversity：food chain （birds and animals）
What’s the function of Paragraph 1
A. To emphasize the importance of the Amazon rainforest.
B. To explain why the Amazon rainforest is a natural treasure.
C. To state the status of the Amazon rainforest: the largest rainforest.
D. To lead into the following paragraphs.
Introduction
As the largest rainforest in the world, it plays a significant role in maintaining the fine balance of the Earth’s ecosystem.
Para.1 Read and answer the question.
6,400
6 million
8
Para.2 Listen and fill in the blanks with figures.
Para.3 Read and complete the mind map.
The forest’s different levels
Para.4 Read and finish the food chain.
at least 87 species, including frogs
leaves and fruit
microorganisms
feed on
break
down
feed on
feed on
get nutrients
insects
the forest’s
food chain
①
②
③
⑤
④
jaguars
Para. 5 Read and fill in gaps.
Significance
The Amazon rainforest__________ ________the planet by fixing carbon and producing over 20 per cent of all the Earth’s oxygen.
Moreover, the Amazon rainforest is a _______________________ that can be used for food or medicine.
Danger
Over the past 50 years, about 17 per cent of the rainforest has disappeared due to _________________ such as agriculture and cattle farming.
Amazon rainforest
breathes
life into
treasure house of species
human activities
请写一封倡议书，呼吁大家关注亚马孙雨林的现状并予以保护。内容包括如下要点:
1.亚马孙雨林的现状和重要性；
2.提出建议。
Dear friends,
I am writing to call on everyone to pay attention to the protection of the rainforest._________________________________________
______________________________________________________
Let’s take action to protect the rainforest now.
Thank you!
Students’ Union
group work
Work in a group of four:
One student for present situation
One student for importance
One student for measures
One student for presentation
Grade and goal
要点
词汇
格式
逻辑
要点
格式
句型
词汇
逻辑
要点
格式
创新
句型
词汇
15
13-15
9-12
6-9
3-6
0-3
Primary Middle Advanced
Assignment
1. Compulsory: Polish your writing (by self-review and peer review).
2. Optional: Are there any places in China with rich biodiversity like the Amazon rainforest What are they Introduce one to the class.
Thank you!