外研版（2019） 必修第一册 Unit 5 Into the Wild Understanding ideas 课件-（23张ppt,内镶嵌视频素材）

(共23张PPT)
Unit 5 Into the wild
The migration of monarch butterflies
Who often migrate
Activity 1：Choose the animals that migrate
African lion
crane [kre n]
白鹤
killer whale（Amercia）
虎鲸
Atlantic Salmon
[ s m n]
大西洋鲑鱼
red panda
England
小熊猫
Monarch Butterfly
金斑蝶
The Monarch’s Journey
Why they often migrate
Predict (预测）
Activity 2. Skimming （Page 68. 3 )
1: Which type of writing styles does the passage belong to
A. narration
B. argumentation
C. exposition
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 (传单) encouraging people to visit North America.
Summary para 1:
monarch
butterflies’
migration
What: Many animals move from one place to another at certain times of the year. This is annual movement
Why (the purpose):
To find food, seek a partner, or in search of warmer weather
para 1make notes 大意+ 短语 =1
main idea: What and why is the migration
1. What do monarch butterflies look like
2. During the migration, where do they start and go to
3.What made us confused 困惑
Read para.2 and answer the following questions.
They are beautiful insects with fine black and orange wings.
They travel from north America to California or Mexico.
Until recently no one knew how the monarch butterflies manage to travel around 4000 kilometers south and find their way to California or Mexico.
para 2.Breif introdiction of the butterflies (背景介绍）
Para 2. Breif introdiction of the butterflies and how they migrate =2
(背景介绍）
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 ______________________
____________________.
cause(原因）- effect（结果） flow chart
Para 3. How they migrate such a long distance
para 3= What is the main idea of para 3 - 书 69页
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 position of
the places where it
a
the sun
will spend the winter
c
b
cause-effect flow chart = 3
Para 3.
Para 3. How they migrate such a long distance
Para 3. How they migrate such a long distance
make notes
para 4.
What is the “serious trouble” means
and main idea
main idea: The reason why the population of monarch has fallen
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.
cause-effect flow chart
para 4 .
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
has crashed
(by as much as 90 per cent)
h
e
g
f
cause-effect flow chart = 4
Review:
1. They migrate to find food, seek a partern or in s_earch_____of warmer weather. （董浩然）
2. Somehow they manage_______(v.设法完成）to travel around 4,000km.（郝帅）
3. The mornach butterflies use its eyes to measure______ the position of the sun. (v.测量太阳的位置）（杜婉玉）
4.The two pieces of information allow the butterfley to determine_______ the way to go.（v.决定）（马荣）
5. The population of butterflies has crashed____ （v.骤减）by as much as 90% in the few years.
Summary
para 1：definition,
purposes of migration
para 2：migration of monarch butterfly
para 3：how to determine the way
para 4：in serious trouble/problem and reasons
para 5：protecting
record its migration
make sure enough plants
1. at certain times of the year
2. annual movement
3. place to place
4. seek a partner, find food,in search of warmer weather
1.use eyes to measure the position of the sun
2. determine the way to do
1. population of butterflies
has crashed
2. cut down trees
and use chemicals
Para 4. The reason why the population of monarch has fallen.
1. cut down tress
2. use chemicals
Para 5. How to protect --human= 5
1. record their migration
2. make sure the enough food.
长难句分析：
1. 判断是否为定从。
2. 定从的结构分析
3. 其他知识点 练习册（P136页)