资料简介
选择性必修一 Unit 3 Conservation (2)
The Sixth Extinction
Reading (2)
Writing features
Word choices
Writing methods
Adjectives
The
Sixth
Extinction
Writing style
Teaching focus
Verb
phrases
Writing purpose
Revision
Extinction?
third fifth The
Sixth
Extinction
Causes
Effects
Solutions
Focus on writing features
Writing features Writing methods
Writing style
Writing purpose
Use different colored pens to highlight at least one example for
each of the four elements listed below.
Focus on writing features
1. In fact, over 90% of all species that ever lived are now extinct.
2. Many scientists say we are now entering the Earth’s sixth mass
extinction.
·facts ·opinions / predictions
·reasons ·solutions
fact
opinion
Focus on writing features
Focus on writing features
·facts: ØIn the last 500 million years, there have been five times when
life on Earth has almost ended.
ØThe “Great Dying” killed 90% to 96% of all species.
ØThe fifth event, which occurred 66 million years ago, caused the
death of the dinosaurs.
ØHuman activity is causing species to die out 1,000 times faster
than normal. numbers
ØMany scientists say we are now entering the
Earth’s sixth mass extinction.
ØScientists believe that up to three quarters of all
species on Earth could die out.
say, believe, think, in one’s opinion…
·opinions /
predictions:
Focus on writing features
ØThere is a long list of reasons why so many species
are dying out: air and water pollution, forests being
destroyed, factory farming and overfishing .
ØWithout forests, we would have no air to breathe and
without clean water we would be unable to survive.
reason, as, without sth. sb. would…,
cause, because, due to, since, for…
Focus on writing features
ØWe need to take steps to save endangered species,
including setting up special areas where plants and
animals can be protected.
ØWe need to change how we work and travel…
ØWe also need to improve our farming methods.
need to do, should do…
Focus on writing features
numbers facts
scientists /
experts say
reason, as…
we need to solutions
reasons
opinions/
predictions
the
sixth
extinction
exposition
Focus on writing features
Øgiving examples
For example, we need to take steps to save endangered
species, including setting up special areas where plants and
animals can be protected.
Focus on writing features
Writing methods
Øciting ideas from experts or authorities
Øgiving examples
Øusing data
Focus on writing features
Writing purpose
Øto explain what the sixth extinction is and its effects
Øto call on people to take action to prevent it from
happening
Focus on writing features
Focus on word choices
Word choices
Adjectives
Verb
phrases
Focus on word choices
Word choices
Adjectives
Verb
phrases
Focus on word choices
Match the adjectives and nouns to make meaningful expressions.
entire
endangered
significant
natural
mass
solar
change
resources
extinction
species
energy
animals
Focus on word choices
entire
endangered
significant
natural
mass
solar
change
resources
extinction
species
energy
animals
Use each expression to make a sentence.
Focus on word choices
1.Climate change is happening right now. It is the most urgent
threat facing our entire species and we should work together to
stop the trend.
2. Many natural parks have been built to protect endangered
animals.
3. We should make significant changes about the way we live.
Focus on word choices
4. If we try our best to recycle the wastes, we can reduce
pollution and conserve natural resources.
5. During the fifth mass extinction event, dinosaurs disappeared
on Earth.
6. Solar energy is energy that comes from the sun and it can be
used in many ways in our daily life.
Focus on word choices
Word choices
Adjectives
Verb
phrases
Focus on word choices
1. Extinctions, where entire species are wiped out, are not
unusual in our Earth’s history. (Para. 1)
wipe out
to destroy or get rid of something completely
be wiped out
Focus on word choices
Observation:
Ø You can never wipe out the past.
Ø One dose of penicillin can wipe out the infection.
Ø Warmer sea temperatures have caused large areas of
coral to be wiped out.
Focus on word choices
2. Experts say that it is not yet too late, if we take action now.
(Para. 4)
take action
to do something to deal with a problem
Focus on word choices
Observation:
Ø It’s time for us to get rid of these bad habits and take action
to protect the environment.
Ø To keep fit, you have to take action and do some exercises.
Focus on word choices
3. For example, we need to take steps to save endangered
species, including setting up special areas where plants and
animals can be protected. (Para. 4)
take steps
to take measures
set up
to arrange, organize or build
Focus on word choices
Observation:
Ø The government must take steps to protect the rain forest.
Ø They set up many branches throughout the country.
Focus on word choices
die out be known as have effected depend on wipe out
take steps take action set up take care of
In the last 500 million years, there have been five mass extinction events
on Earth. In the third event, which 1 the “Great Dying”,
90% to 96% of all species 2 . Of course, species died out
due to many causes. But nowadays, human activity 3 all
types of species that we 4 for living.
is known as
died out
has affected
depend on
die out be known as have effected depend on wipe out
take steps take action set up take care of
Focus on word choices
We need to 5 to avoid the sixth mass extinction.
We should 6 to save endangered animals and
plants, and 7 special areas to 8 them before the
next extinction comes that may 9 the entire species.
take action / take steps
set up take care of
wipe out
take action / take steps
Writing features
Word choices
Data
Examples
Experts / scientists
Adjectives
The
Sixth
Extinction
Exposition
Summary
Verb
phrases
Homework
Thank you!
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