北师大版（2019）选择性必修 第一册Unit 3 Conservation Lesson 1 The Sixth Extinction 课件（13张ppt）

Unit 3 Conservation
Topic Talk
Watch the video and answer the questions.
Warming-up
Watch the video
How many types of Pollution is mentioned?
Warming-up
Farm
What is extinction?
Extinction is a situation in which something no longer exists.
Para. 1:
Para. 2:
Para. 3:
Para. 4:
Background history of the sixth extinction
Causes of the sixth extinction
Effects of the sixth extinction
What we can do to prevent the sixth extinction
Get the main idea of each paragraph.
Read and explore
entire species are
wiped out
over 90% of all species that
ever lived
the third mass extinction, killed 90% to 96% of all species; the fifth event, which occurred 66 million years ago, caused the death of the dinosaurs
Volcano eruptions, asteroids hitting the Earth from space, changes in sea levels, the decrease of oxygen content of the sea, global warming
Change the way we live, including setting up special areas where plants and animals can be protected …
Focus on word choices
Match the adjectives and nouns to make meaningful expressions.
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
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.
Use each expression to make a sentence.
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.
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. 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.
is known as
died out
has affected
depend on
take action
take steps
set up
take care of
wipe out
As a student, what do you think you can do to help the Earth?
Reduce waste
Put rubbish into separate dustbins
Cycle or take public transportation
Use fewer plastic bags while going shopping
Thank You !