外研版 (2019)必修 第一册Unit 5 Into the wild导学案及答案

Unit 5  Into the wild

导学案

Step 1 　General reading

1. What is the main idea of the passage?

    A. The monarch’s migration.

    B. The reasons for monarch’s migration.

C. Mexico’s monarch.

2. 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.

3..Read the text and match the main idea of the paragraphs.

1．Para. 1　      A．How to save the monarch butterflies.

2．Para. 2　    B．The scientists have solved the mystery of the monarch butterflies' migration.

3．Para. 3        C．The mystery of monarch butterflies.

4．Para. 4　      D．The simple introduction of animal migrations.

5．Para. 5         E．The reason why the population of monarch butterflies has crashed.

Step 2　Careful reading

Read the text carefully and choose the best answer.

1．According to the passage, animals migrate for many reasons except ________.

A．finding food　

B．seeking a partner

C．enjoying beautiful scenery

D．searching of warm weather

2．What mystery the scientists have solved?

A．Why monarch butterflies migrate.

B．Where monarch butterflies spend the winter.

C．When monarch butterflies change their directions of migration.

D.  How monarch butterflies succeed in migrating.

3．What can we infer from the passage?

A．Every summer, monarch butterflies will manage to travel north.

B．The population of the monarch butterflies may become larger and larger.

C．The main reason why the population of the monarch butterflies is falling is

human activity.

D．People have made it a reality that monarch butterflies have enough plants to eat.

Step 3  Read the passage carefully and do activities.

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 ___________________________________.

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.

Step 4 Think and share:

1. What impresses you most about the monarch butterfly?

_________________________________________________________________________________________________________________________________________________________________________________________________________.

2. What can people do to help protect the monarch butterfly?

__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________.

Step 5 Summary

Many animals move from one place to another at certain times of the year, 1.______________ is called migration. Every autumn, 2.______________(million) of North American monarch butterflies begin their journey.

A team of scientists have now found 3.______________ the monarch is able to tell the time of day, and then uses its eyes to measure the 4.______________(position) of the sun. These abilities allow the butterfly 5.______________(determine) the way to go.

The solution to the mystery of the monarch's 6.______________(amaze) ability comes at a time when it is 7.______________ serious trouble. Its population 8.______________(crash) by as much as 90 per cent in the last few years because of human activities.

The research on the monarch's behaviour has however led to a greater 9.______________(aware) of this creature. By doing more research, the monarch butterfly can keep its 10.______________(place) in the natural world for a long time to come.