外研版（2019） 必修第一册 Unit 5 Into the Wild Understanding ideas 课件-(22张ppt)

Into the wild
Understanding ideas （p.50-52）
Watch and say
1. What phenomenon is mentioned in the video?
2. What is “animal migration” ?
Animal migration
Animal migration refers to the movement of a species from one habitat to another in response to seasonal changes to the environment.
Migration happens in all parts of the animal kingdom, from fish and insects to birds, reptitles and mammals.
Before reading
Look at the pictures and choose the animals that migrate.
d
e
f
a
monarch butterfly
帝王蝶 /黑脉金斑蝶
b
Siberian crane
西伯利亚鹤
c
Atlantic salmon大西洋鲑鱼
red panda
Killer whale 虎鲸
African lion
√
√
√
√
While-reading
Go through the passage quickly and
answer the following question:
1.What is the main idea of the passage?
A. The monarch’s migration.
B. The reasons for monarch’s migration.
C. Mexico’s monarch.
The main idea of a passage can be found from its title, the topic sentence, or even the pictures.
Tips
While-reading
Activity 1
Title
The topic sentence
Pictures
2. Where are you most likely to find the passage?
A. In a scientific research paper about the monarch butterfly’s migration.
B. In a popular nature magazine introducing the
monarch butterfly.
C. In a travel leaflet encouraging people to visit
North America.
?
Why do they migrate?
They migrate to find food,seek a partner,or in search of warmer weather.
When and where do they migrate?
Every autumn,they manage to travel around 4,000 kilometres south and find their way to California or Mexico.
01
02
Activity 2
California
Mexico
P52
Activity 3
Complete the sentences with expressions from the passage. Then use sentences to complete the “cause-effect” flow chart.
d
a. The monarch butterfly is able to tell _____________.
b. Using these two pieces of information, the monarch butterfly determines____________.
c. The monarch butterfly measures________ __________________ with its eyes.
d. The monarch butterfly reaches __________________________________.
the time of day
the way to go
the
a / c
c / a
b
position of the sun
the places where it will spend the winter
Check your answers!
h
e. Humans _________ trees.
f. The ______________________________ where monarchs can be found is destroyed.
g. Humans use chemicals that ____________ that monarch caterpillars eat.
h. The monarch butterfly’s population _________________________________ in the last few years.
cut down
natural environment of many places
kill the plants
(by as much as 90 per cent)
e / g
g / e
f
has crashed
A.Promising B.Indifferent C.Negative D.Cold
What is the author's attitude to monarch butterflies?
Activity 4
After reading
summary, analyzing, retelling
The monarch's journey
The definition of migration
The background to the monarch's migration
The mystery of the monarch's migration
The trouble of the monarch
Its solution
Learn to understand the passage.
task 1
Influences of human activities on the monarch
The
Monarch’s Journey
Where
Time
How
Every _______
Travel around 4000 km south to __________or ______ .
Use ____to measure________
_________________________
and ________________.
Main causes:_________
such as _____________
and _____________
cutting down trees
using chemicals
Solution:
Make sure that there are ____________ for it to feed on
enough plants
autumn
California
Mexico
the time of the day
eyes
where the sun is in the sky
human activity
Trouble:_______________________
______________________________
its population has crashed by as much as 90%
the point
Fill in the blanks and try to retell the passage The Monarch’s Journey.
3
1. These two pieces of information- the time of day and the point where the sun is in the sky- allow the butterfly to dertermine the way to go.
定语从句修饰先行词the point
关系副词
Paraphrase
The butterfly is aware of the time of the day and the position of the sun in the sky, so it can use these two pieces of information to find out which way to go.
这两条信息——一天中的时刻和太阳在天空中的位置——让黑脉金斑蝶能够判定前进方向，最终成功抵达过冬的地点。
Sentence analyzing for better understanding
2
2. The solution to the mystery of the monarch's amazing ability comes at a time when it is in serious trouble.
时间状语从句
solution to sth
……的解决办法
①There's no simple solution to this problem.
这个问题没有简单的解决办法。
②She came up with an ingenious solution to the problem.
她想出一个特殊的办法来解决这个问题。
in serious trouble
①Without your help, we would have been in serious trouble.
没有你的帮助，我们会遇到大麻烦。
②You will be in serious trouble if anyone finds out the truth.
如果有人发现真相，你的麻烦就大了。
遇到大麻烦
Paraphrase
People solved the mystery of the monarch's amazing ability at the same time that the monarch is facing a serious and difficult situation.
黑脉金斑蝶这一惊人能力的奥秘被揭开时，这一生物正处于水深火热的生存状态中。
Think and Share
1. What impresses you most about the monarch butterfly?
2. What can people do to help protect the monarch butterfly?
1.Animals?are?close?friends?of?human?beings.?
2.Protecting animals is also protecting the Earth.
3.Love life,stop killing,we have a common earth.
Homework
Write a composition about how to protect animals.
Thank you!