外研版（2019） 必修第一册 Unit 5 Into the Wild Understanding ideas 课件 (28张ppt)

(共28张PPT)
Unit 5 Into the wild
The Monarch's JourneyLearning Objectives
In this class, you are expected to :
1. know the style of the scientific exposition, and think critically about the phenomenon.
2. identify the cause and effects.
3. have a better understanding of relationships between humans and animals and respect nature.
to be curious ,wise,logical ,critical readers
Para 5MeasuresBe curious Choose where you are most likely to find the passage.BelogicalChoose 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.
Be logical
the structure of an exposition
mystery
migration
phenomenon
and the cause
When/where/ why
how
The Monarch's Journey
migration
population crash
Survival
effect/trouble
solution
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.Migrationphenomenonandthe causeReadparagraph 1BelogicalEvery 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.when where how long BelogicalNorth AmericaCalifornia or MexicoReadparagraph 2A 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.BelogicalWhat mystery have the scientists solved cause and effectReadparagraph 3Ateam 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.BelogicalWhat mystery have the scientists solved the monarch is able to tell the time of dayIt uses its eyes to measure the position of the sunallow the butterfly to determine the way to goreach the placesGroup workUnit 5 Into the wildUnderstanding ideas: THE Monarch’s JourneyABcDThe 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.BelogicalCauses and effects of the monarch population crashWhat has madeits populationcrashedbyas much as 90 percent paragraph 4BelogicalThe 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.solutionWhat is the solution to the problem Readparagraph 5cause and effect
Humans _________ trees
natural environment
kill the plants
population
——————
use chemicals to ____________ that
monarch caterpillars eat.
cut down
destroy_________________________
has crashed
Be logical(3')
Working together to
will increase
enough plants to feed on
Make sure
if it works, the population
_______________
record its migration
solution
Be logical
survival
To protect the monarch is a long process.
SignificanceWhy do we make the reserch Is it useful Para5.tell The more ____________________________,the greater____________________________.we know about this lovely creaturethe chance it will survive and keep its place in the natural world for a long time to come (1)What impresses you most about the monarch butterfly
“Its population has crashed by as much as 90 per cent in the last few years”
Be critical
Think and share:
It' s high time that we should think over about the causes and take measures.
At one with nature天人合一Green development绿色发展
Protect her
Protect ourselves
Poster Design
Think of a slogan to call on everybody to protect the monarch butterfly.
Design a poster
Level one :
Level two :
Have a sitcom(情景剧）
(2)
(3). Why does the author use “journey” instead of “migration” in the title
Be critical
The monarch's journey to the destination
Scientists’ journey to discovering the mystery
Human’s journey to protecting the monarch
long and tough process in need of joint efforts
With joint efforts, we can make a difference to our journey to protecting the ecosystem.

Homeworkanimal migrationLevel 1:search more informationabout animal migrationon the internet.Level 2:Write a composition about how to protect the monarch butterfly.Self-assessment (1')
In the class, I have ...
1. know the style of the scentific exposition, and think critically about the phenomenon.
2. identify the cause and effects.
3. have a better understanding of relationships between humans and animals and respect nature.