(共38张PPT)
Unit 5
Unit 5
Into the wild
To skim the passage by focusing on key words to get the main idea
To understand the monarch butterfly’s features and how it migrates
To know why the number of monarch butterflies falls and what people should do to improve the condition
monarch
monarch butterfly
Atlantic
whale
annual
migration
migrate
seek
n. 君主,国王
黑脉金斑蝶
adj. 大西洋的
n. 鲸
adj. 一年一度的,每年的
n. 迁徙
v. 移栖,迁徙
v. 寻找,寻求
Read after the tape and speak out the Chinese immediately.
professor
measure
position
determine
eventually
solution
mystery
amazing
n. 教授
v. 量,测量
n. 位置
v. 测定,确定
adv. 终于,最终
n. 解决,解决方法
n. 难以理解的事物,谜
adj. 惊人的,了不起的
crash
per cent
destroy
chemical
caterpillar
creature
survive
effect
flow chart
v. 暴跌
n. 百分比
v. 破坏,毁掉
n. 化学品
n. 毛虫(蝴蝶等昆虫的幼虫)
n. 生物,动物
v. 活下来,幸存
n. 影响,结果
流程图,作业图
Look at the following pictures.
Can you use one or two words to describe their action
migration
Watch and say
What phenomenon is mentioned in the video
Animal migration
Animal migration refers to the movement of a species (物种) from one habitat (栖息地) to another in response to seasonal changes to the environment. Often covering great distances and involving huge numbers of animals, it can be fascinating to observe. Migration happens in all parts of the animal kingdom, from fish and insects to birds, reptiles (爬行动物) and mammals (哺乳动物).
What is “animal migration”
Why do animals migrate
When do animals migrate
Can human activities influence on animal migration How
Look at the pictures and choose the animals that migrate.
The animals that migrate include monarch butterfly, Siberian crane, Atlantic salmon, and some types of killer whales.
Talking
Now talk about what you know about animal migration.
The Monarch’s Journey
Title
The topic sentence
Picture
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 sentences, or even the pictures.
Tips
Go through the passage quickly and get its main idea.
Read the passage and find out what mystery the scientists have solved.
The scientists have solved the mystery of how monarch butterflies manage to travel a long distance and find their way to their destination.
In a scientific research paper about the monarch butterfly’s migration.
In a popular nature magazine introducing the monarch butterfly.
In a travel leaflet encouraging people to visit North America.
Choose where you are most likely to find the passage.
Why do you choose that answer
Match the main idea with its corresponding paragraph.
Paragraph 1 a. An explanation of animals' migration
Paragraph 2 b. Human efforts to protect monarch butterflies
Paragraph 3 c. The magical migration of monarch butterflies
Paragraph 4 d. The effects of human activity on monarch butterflies
Paragraph 5 e. The abilities of monarch butterflies' successful migration
From the arrangement of the passage, which parts do you think are more important in the passage Why
paragraph 3, 4 and 5
The writer uses longer paragraphs to tell us more information --- the monarch butterfly’s migration, trouble and people’s efforts to improve its conditions.
Read the text (pp.50-51) and Fill in the blanks in the chart.
The research on the monarch butterfly
The ________ of its migration
Its population
(to be continued)
mystery
It can ________ its ideal place.
People are _________ the environment.
The ________ were killed and there is no food for the monarch caterpillars.
It has the ability to tell the _________.
It can find out the ________ of the sun.
The population of the monarch has __________ by 90%.
time
destroying
position
plants
reach
decreased
1. Why do many animals migrate (Para. 1)
2. How does the monarch determine the way to go (Para. 3)
3. What has happened to the monarch in the past few years and how did it happen (Para. 4)
4. What's the significance of the research on the monarch (Para. 5)
Read paragraph by paragraph to answer the following questions.
1. They migrate to find food, seek a partner, or in search of warmer weather.
2. The monarch is able to tell the time of the day and the point where the sun is in the sky.
3. Because of human activities, the number of the monarch has crashed by as much as 90 per cent in the past few years.
4. The research on the monarch’s behavior has led to a greater awareness of it and people have been working together to record its migration and make sure there are enough plants for it to feed on.
Check your answers!
Complete the sentences with expressions from the passage. Then use the sentences to complete the “cause-effect” flow charts.
The monarch butterfly is able to tell
_____________.
b. Using these two pieces of information, the monarch butterfly determines ____________.
the time of day
the way to go
c. The monarch butterfly measures
_____________________ with its eyes.
d. The monarch butterfly reaches
__________________________________.
the position of the sun
the places where it will spend the winter
a / c
c / a
b
d
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
g / e
f
Match the causes and the effects.
1. The monarch butterfly is able to tell the time of day.
2. People cut down trees and use chemicals.
3. People have researched the monarch's behaviour.
4. There are enough plants for the monarch caterpillars.
A. People have begun to pay attention to the monarch.
B. The population of the monarch will increase.
C. It can determine where it should go.
D. Monarch caterpillars don't have enough plants to eat.
Choose the right item from the box and make the summary complete.
aware, increase, position, wing, human activity, in danger
Every autumn millions of North American monarch butterflies use their beautiful black and orange 1. ________ to fly around 4, 000 km south to California or Mexico for the winter. Until recently it was not known that they found their way by looking at the time of day and the 2. ________ of the sun in the sky.
wings
position
This knowledge comes at a time when the monarch is 3. __________. Its population has dropped to ten per cent, mostly due to 4. ______________. It has, however, led to a greater 5. ________ and people are working together to improve the monarch's chances of survival. Hopefully, their numbers will 6. ________ in the future.
aware, increase, position, wing, human activity, in danger
in danger
human activity
awareness
increase
1. What impresses you most about the monarch butterfly
2. What can people do to help protect the monarch butterfly
Tips: Students can discuss the questions with their group members. Then one student answers the questions, but allow others to add up.
What other animals do you know have similar condition to the monarch butterfly What do you think people should do to help them
animal;
its living habits;
its habitat;
the problem it faces;
how the problem happens;
solution
Tips for expressing ideas
Reduce the use of
pesticides and chemicals
Plant more trees
Do a wildlife survey
Create wildlife habitats
Write a short summary based on The Monarch’s Journey. Try to use as many new words and key expressions as you can. Your summary should not be less than 100 words.