资源简介

(共21张PPT)
Unit 5
Understanding ideas
--The Monarch’s Journey
Learning aims
1.To understand the text in details.
2.To improve the reading skills, especially fast reading and careful reading.
3.To use the flow chart to express cause—effect
relationship.
4.To enhance the awareness of protecting animals.
Migrate means animals move from one place to another.
There are many animals that migrate every year.
monarch butterfly
Atlantic salmon
Siberian crane
killer whale
（鲑鱼）
（西伯利亚鹤）
（虎鲸）
（黑脉金斑蝶）
migration
migrate
v.迁徙
n. 迁徙
The Monarch’s Journey
The North America
Mexico
California
The monarch takes a journey from_______________to
_________and_____________.
While Reading
（一）Many animals move from one place to another at certain times of the year. This annual movement is called migration.
许多动物都会在每年的特定时间从一处迁移到另一处。这种一年一度的行为叫作“迁徙”。
They migrate to find food, seek a partner, or in search of warmer weather.
它们为了觅食、寻找配偶或温暖的环境而迁徙。
One of the most wonderful migrations in nature is that of the North American monarch butterfly.
自然界最为壮观的迁徙之一就是北美洲黑脉金斑蝶的迁徙。
The Monarch’s Journey
黑脉金斑蝶的旅程
1、from one...to another 从一个……到另一个……
2、annual / nju l/ adj. 一年一度的，每年的
an annual movement 一年一度的行为 / 活动
3、 migrate /ma ɡre t/ v. 移栖，迁徙
4、 seek /si k/ v. 寻找，寻求
seek advice/help 征求意见 / 寻求帮助
5、in search of 寻找
（二）Every autumn, millions of these beautiful insects with fine black and orange wings begin a long and difficult journey.
每年秋天，数百万只这种翅膀橙黑相间的美丽昆虫都会开启漫长且艰辛的旅程。
Somehow they manage to travel around 4,000 kilometres south and find their way to California or Mexico.
它们总是能够完成约 4 000 千米的南行旅程，成功到达（美国）加利福尼亚州或墨西哥。
However, until recently no one knew how they did this.
然而，直到最近人们才明白它们是如何做到的。
1、millions of 数百万的
2、somehow adv. 用某种方法，不知怎么地
3、 manage to do sth. 设法做成某事
4、、 find one’s way to... 到达……；找到去……的路
appearance
reasons to migrate
time of migration
places to migrate
distance to migrate
Complete the chart (Para1-2)
beautiful insects with fine black and orange wings
find food, seek a partner,
in search of warmer weather
every autumn
4000 kilometres
California or Mexico
（三）A team of scientists led by Professor Eli Shlizerman at the University of Washington has now found the answer.
一支由伊莱·史利泽曼教授领导的来自华盛顿大学的科学家团队现已找到了答案。
They have found out that the monarch is able to tell the time of day. It uses its eyes to measure the position of the sun.
他们发现，黑脉金斑蝶可以判断时间，并能用眼睛测量太阳的位置。
These two pieces of information— the time of day and the point where the sun is in the sky
这两条信息—一天中的时刻和太阳在天空中的位置
— allow the butterfly to determine the way to go.让黑脉金斑蝶能够判定前进方向 。
Eventually, it manages to reach the places where it will spend the winter.最终成功抵达过冬的地点。
two pieces of information 两条信息
one piece of information 一条信息
allow sb./sth. to do sth. 允许/让/使某人/某物做某事
determine /d t m n/ v. 测定，确定
eventually / vent u li/ adv. 终于，最终 (= finally/ at last)
a. The monarch butterfly is able too 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 the day
the way to go
the position of the sun
the places where it will spend the winter
d
a
c
b
Read para3 and complete.
1、solution （ n）. 解决，解决方法
2、the key to...……的关键
3、the entrance to...……的入口
4、mystery （ n）. 难以理解的事物，谜
5、amazing （ adj）. 惊人的，了不起的
（四）The solution to the mystery of the monarch’s amazing ability comes at a time when it is in serious trouble.
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。
Its population has crashed by as much as 90 per cent in the last few years.
其数量在近年内减少了百分之九十之多。
Sadly，human activity is the main reason why the number of monarch butterflies is falling.
人类活动 是造成其数量下降的主要原因。
In many of the places where the butterfly can be found，
在黑脉金斑蝶生存的许多地方，
people are destroying the natural environment. They cut down trees
人们正破坏着 那里的自然环境。 他们砍伐树木，
and use chemicals that kill the plants that monarch caterpillars eat.
他们所用的化学制剂杀死了黑脉金斑蝶幼虫食用的植物。
6、in serious trouble 遇到很大的麻烦
7、crash ( v). 暴跌
8、 per cent ( n). 百分比
as much as 90 per cent 多达百分之九十
9、the number of... ……的数量
a number of 许多，大量
10、 destroy (v). 破坏，毁掉
11、cut down trees 砍伐树木
1.What trouble has the monarch butterfly faced
Its population has crashed by as much as 90 percent.
2. What is the main reason for that trouble
cut down trees
use chemicals
kill the plants that monarch caterpillars eat
human activity
Read para4 and answer the questions.
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
kill the plants
has crashed
natural environment
f
e
g
Complete the sentences and the “cause-effect” flow chart.(Para4)
(五）The research on the monarch’s behaviour has however led to a greater awareness of this creature.
不过，对黑脉金斑蝶行为的研究 也使得人们对这种生物有了更多的了解。
People have been working together to record its migration and make sure that there are enough plants for it to feed on .
人们已经在共同努力，记录它的迁徙，并确保 它有足够的食物。
If this works, there may come a time when the number of monarch butterflies increases once again .
如果这些努力产生效果，黑脉金斑蝶的数量在未来有可能再次回升。
The more we know about this lovely creature, the greater the chance it will survive and keep its place in the natural world for a long time to come.
我们对这种迷人的生物了解越多，它们在自然界中得以长久生存并保持其位置的可能性就越大。
1、the research on 对……的研究
2、 lead to 导致，造成
3、 awareness n. 认识，意识
4、 creature / kri t / n. 生物，动物
5、 make sure that... 保证 / 确保……
6、feed on 以……为食；以……为生
7、once again (= once more) 再次
After Reading
Task 1: Look through the passage and find the answer.
1. What's the text type of the passage
A.argumentation(议论文)
B. narration（记叙文）
C. exposition（说明文）
Paragraph 1
Definition（定义）/explanation about migration
Paragraph 2-3
Introduce Monach 's migration
Paragraph 4
Monarch's trouble and causes
Paragraph 5
Measures to protect monarch
butterfly
task2 ：what’s the main ideas of each para
1. What is the main idea of the passage
A. The monarch butterflies' migration.
B. The reasons for monarch’s migration.
C. Mexico’s monarch.
Skim and choose.
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.
2. Where are you most likely to find the passage
Group Discussion
Do
Don’t
1、record its migration.
2、plant more trees.
3、care about them.
1、keep them for money.
2、kill/hunt/hurt animals.
3、use more chemicals.
How to protect the monarch butterflies
Some useful expressions:
In my opinion, it's important for us (not) to...
From my point of view, I think we should (not)...
4、choose green means of transport.
Thanks for your listening.

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