资源简介

(共23张PPT)
_____________n. 化学品 _____________ v. 测量
_____________ n. 毛毛虫 _____________ n.位置
_____________ n. 生物，动物 _____________ v. 测定，确定，决心
_____________v. 幸存 _____________ adv. 终于
_____________ n.黑脉金斑蝶 _____________ n. 解决的方法
_____________adj. 一年一度的 _____________ n.难以理解的事，迷
_____________n. 迁徙 _____________ adj.惊人的，了不起的
_____________ v. 迁徙 _____________v. 暴跌，坠落
_____________v. 寻找，寻求 _____________ n. 百分比
_____________n. 教授 _____________ v. 毁坏，毁掉
survive
annual
migratioin
migrate
seek
professor
measure
position
determine
eventually
solution
mystery
amazing
crash
per cent
destroy
Revision
chemical
caterpilla
creature
monarch butterfly
Look at the pictures and guess what these animals are doing
They are migrating.
Many animals move from one place to another at certain times of the year. This annual movement is called migration.
Can butterflies migrate
The monarch butterfly is the only butterfly that can migrate. It is a kind of beautiful insect with fine black and orange wings. It usually has a short life of 6 weeks, and its hometown is mainly
in America. And the name is related to _____________________.
King William III of England
Monarch butterfly
By Yushen
The Monarch’s Journey
Understanding ideas:
The Monarch’s Journey
Unit 5 Into the Wild
The Monarch’s
Journey
While-reading
Skim
Para. 1
Para. 2
Para. 4
Para. 5
a. How do people solve the trouble
b. What is migration
c. What is monarch’s serious trouble
d. When & where did the monarch migrate
e. How does the monarch migrate
Para.3
Match the main idea with each paragraph
2.Animals migrate for:
A. food B. partner
C. warmer weather D. travel
1.Migration is an ________ movement in which many animals move from ______________________.
1.What is migration
While— reading
Read para.1 and answer the question.
annual
one place to another at certain times
milkweed马利筋
Monarch caterpillars feed on milkweed.
Para1. Many animals move from one place to another at certain times of the year. This annual movement is called migration. They migrate to find food, seek a partner, or in search of warmer weather. One of the most wonderful migrations in nature is that of the North American monarch butterfly.
Introduction to migration
When _________
How far They manage to travel around
__________
Where ____________
every autumn
California or Mexico
4000 kilometers
Monarch's journey
While— reading
Read para.2 and fill in the mind map
California
Mexico
North
South
a long and difficult journey
Para2. Every autumn, millions of these beautiful insects with fine black and orange wings begin a long and difficult journey. Somehow they manage to travel around 4,000 kilometres south and find their way to California or Mexico. However, until recently no one knew how they did this.
The Monarch’s migration
read para.3 and choose the best answer.
While— reading
The North American monarch butterflies use
________ to measure the position of the sun.
A. eyes
B. noses
C. legs
D. ears
A
a. The monarch butterfly is able to tell_______________.
b. Using these two pieces of information, the monarch butterfly
determines _______________.
c. The monarch butterfly can measure_____________________.
d. The monarch butterfly reaches ________________________.
the time of day
the way to go
the position of the sun
the place where it will spend the winter
read para.3 and finish the “cause-effect” flow charts
cause
effect
a
c
b
d
While— reading
Para 3. A team of scientists led by Professor Eli Shlizerman at the University of Washington has now found the answer. 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. These two pieces of information — the time of day and the point where the sun is in the sky — allow the butterfly to determine the way to go. Eventually, it manages to reach the places where it will spend the winter.
The mystery of the monarch’s amazing ability
e. Human _______________trees.
f. The ___________________of many places (where monarchs can be found )is destroyed.
g. Humans use the chemicals that ______________that monarch
caterpillars eat.
h. The monarch butterfly’s population ______________in the last few years.
read para.4 and finish the “effect-cause” flow charts
kill the plants
natural environment
cut down
has crashed
cause
effect
e
g
f
h
While— reading
Para4. The solution to the mystery of the monarch’s amazing ability comes at a time when it is in serious trouble. Its population has crashed by as much as 90 per cent in the last few years. Sadly, human activity is the main reason why the number of monarch butterflies is falling. In many of the places where the butterfly can be found, people are destroying the natural environment. They cut down trees and use chemicals that kill the plants that monarch caterpillars eat.
Causes of the monarch’s trouble
enough food
1. What measures are taken to protect monarch butterfly
Read for the solutionpara.5
While-reading
record___________
make sure there are
_____________ for it to
feed on
the number of monarch butterflies_________
What measure
What effect
its migration
enough plants
increases
Para5. The research on the monarch’s behaviour has however led to a greater awareness of this creature. People have been working together to record its migration and make sure that there are enough plants for it to feed on. If this works, there may come a time when the number of monarch butterflies increases once again. 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.
Measures for protection
Protecting wildlife is protecting humans ourselves!Remember Plant….
Post reading
discussion
Be ….
Don’t……
What measures should be taken to protect the endangered animals
Fill in the blanks
The 1.__________ (migrate) of the North American monarch butterfly can be considered as the most 2. __________ (wonder) one in nature. In other words, it’s 3. ___ wonder!
Every autumn, these beautiful insects 4. have black and orange wings manage to travel to California or Mexico. At first, no one knows how they migrate. 5.________, a team found the answer eventually. The reasons why the monarch can reach the destination 6._________ (correct) are that not only are they able to tell the time of the day, but also they have the ability 7.___________ (determine) the position of the sun.
The current situation is that the number of the monarch is falling, which leads 8.___ the awareness of this creature. Human 9.
(behave) have an effect on them, but people are taking 10.__________ (measure) to save them.
migration
wonderful
a
that/which
However
correctly
to determine
to
behaviors
measures

展开更多......

收起↑