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(共15张PPT)
Unit 5 Into the wild
Do you know the names of these animals
monarch butterfly
Siberian crane
red panda
Atlantic salmon
killer whale
African lion
Look and choose the animals that migrate.
monarch butterfly
Siberian crane
red panda
Atlantic salmon
killer whale
African lion
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√
√
√
The monarch butterfly is one of the most recognizable and well studied butterflies on the planet. Its orange wings are laced with black lines and bordered with white dots. Famous for their seasonal migration, millions of monarchs migrate from the United States and Canada south to California and Mexico for the winter.
The monarch butterfly
Choose where you are most likely to find the passage.
1 In a scientific research paper about the monarch butterfly's migration.
2 In a popular nature magazine introducing the monarch butterfly.
3 In a travel leaflet encouraging people to visit North America.
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.
1. What is migration
Many animals move from one place to another at certain times of the year. This annual movement is called migration.
2. What's the purpose of migration
To find food, seek a partmer, or in search of warmer weather.
Answer the following questions.
Answer the following questions.
3. What does monarch butterfly look like
Beautiful insects with fine black and orange wings.
4. During the migration, where do they start and go to
From north America to California or Mexico.
What mystery have the scientists solved
North
South
How
The scientists have solved the mystery of how monarch butterflies manage to travel a long distance and find their way to the south.
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
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
decrease
increase
What should people do
Raise awareness of this creature
Plant native milkweed(马利筋草) spieces to feed on
Don't use chemicals that kill the plants
Protect the natural environment
Spread the word!
The Monarch's Journey
when/where/why
how
trouble
solution
a migration
and the cause
mystery
population crash
survival
1.from one...to another 从一个……到另一个
2.manage to do 设法做成某事
3.find one’s way to 设法找到去……的路
4.the solution to... ……的解决方法
5.in trouble 处于困境中
6.cut down 砍倒
7.lead to 导致；造成(后果)；通向……
8.make sure 确保，确信；查明，弄清楚
9.feed on 以……为主食
word bank
Of all mass migrations, that of the North American monarch butterfly is one of the most __________ (wonder). Every autumn ________(million) of these beautiful insects manage __________(travel) 4, 000 kilometres south and find ways to places ________ they will spend winter. A team of scientists ___(lead) by the university of Washington _____________(discover) that the monarch is able to tell the time of day _______ uses eyes to measure the position of _____ sun. The information _______(allow) the butterfly to determine the way ______(go).
wonderful
millions
to travel
where
led
has discovered
and
the
allows
to go

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