北师大版（2019）选择性必修 第一册Unit 3 Conservation Lesson 1 The Sixth Extinction 知识点课件 (18张ppt)

(共18张PPT)
选必一 Unit 3 L1-L2
知识点
1. How many times up to today has life on Earth almost died out
die out 消失，灭绝
The species(单复同形） has nearly died out because its habitat（栖息地） is being ___________ (destroy).
The wind died away at dust.
Many trees are dying off for _______ (lack/lacking) of water.
destroyed
lack
2. Extinctions, where entire species are wiped out, are not unusual in our Earth’s history.
wipe out 彻底毁灭，抹去 wipe 擦
wipe away 擦去
wipe her eyes with a tissue 用...擦...
wipe up 擦干
wipe the sweat from/off his forehead 从...擦去...
The disease _________ (威胁) to wipe out the entire population.
threatens
3.These include the third mass extinction, known as “Great Dying”, which killed 90% to 96% of all species.
(1) adj. 大量的
mass _________ 批量生产 mass _________ 大灭绝
the problem of mass _____________ 大批人失业的问题
(2) n. 大量 （a mass of + C/U + 谓语复/单)
A mass of books _____(be) distributed to Project Hope.
There ______ (be) masses of people in the stores yesterday.
mess n.肮脏，杂乱 messy adj.凌乱的
The room was in a mess.
production
extinction
unemployment
are
were
4. And the fifth event, which occurred 66 million years ago, caused the death of the dinosaurs.
occur vi. 发生 occurring/occurred
(sth) occur(s) to sb. （想法）浮现于sb.脑海中
It occurs to sb to do sth sb.想到做sth
It occurs to sb that... sb.想到...
It occurred to him that he had not _______ the light ____ （关灯）.
It occurred to me/hit me/ struck (strike) me that I should found a company of my own.
switched
off
5. The reasons for extinctions are varied.
varied adj.各种各样的（单/复） vary v. 相异
various adj. 各种各样的（复） variety n.种类
Our school provides a varied diet for students.
The ________(long) of the wires vary between 25cm and 50cm.
He is always having various/ a variety of / varieties of reasons for being late.
lengths
6. According to scientists, they include volcanic eruptions, asteroids hitting the Earth from space, changes in sea levels, the decrease of the oxygen content of the sea and global warming.
decrease / fall / drop by 了/ to 到
increase by / to
The charge for transportation is on the decrease because of lower fuel costs.
7. This time, human activity will be to blame.
vt. 责怪
blame sb for (doing) sth. 因（做）sth.而指责sb.
be to blame （for sth) （主动表被动）
n. 责备 accept/ take the blame for... 为...负责
We should blame the man for the dying out of some species.
It is his carelessness that is to blame for his being injured.
8. A 2015 study...looked at how quickly species die out due to natural causes...
due to / owing to / because of / thanks to 因为 / 由于
be due to do sth. 预期的
The boat is due to arrive at 12 o’clock.
Because of / Owing to the snow, the flight has been cancelled.
9. It is clear that human activity has negatively affected all other species on Earth, including animals and plants.
affect v.影响 be affected by....
affection n.喜爱
have a great affection for... 非常喜爱...
have an effect on.... 对...的影响
Does television have an effect on children’s behaviour
By her conduct we can judge whether she has an affection for the poor boy.
10. Of course, as we humans depend on so many species for our survival, we would also be at risk of dying out.
be at risk 处境危险
take the risk of doing sth.冒险做sth.
be at the risk of doing sth.
risk (one’s life) doing sth. 冒险做sth. a narrow escape
He risked losing the opportunity of ___________(hire) by the company to point out the mistake of the employer.
being hired
11. store
n.商店 v. 贮存
animals storing up food for the winter
restore v. (使)恢复
Such kindness restores your _______（信任） in human nature. (=makes you believe most people are kind)
faith
12. set out 开始做；出发
(1) set out to do=set about doing
开始做
(2) set out for sp.
=set off for sp.
=leave for sp.
=head for sp. 出发
(3) set up 创建=found=establish
(4) set aside 把...放到一边；省出
13. consume v.消费；消耗
consumer n.消费者
consumption n.（能量、食物、材料的）消耗；消费
The electricity industry consumes large amounts of ___________（化石燃料）.
消费者权利 consumer ______
消费型社会 a consumer _______（= one where buying and selling is considered to be fairly important)
fossil fuels
rights
society
14. waste v&n 浪费
v. She wasted no time in __________ (拒绝）the offer.
翻译： Don’t waste your sympathy on him--he got what he deserved.
n. a waste of time
adj. wasteful since: 自从；因为；既然
Visit fast food restaurants less often, since they make us be more wasteful__________（消费者）.
rejecting
consumer
15.Plastic packets keep the coconut clean during the transportation process.
transportation n.交通运输系统 = transport n&v
transport...from sp.1 to sp.2
Believe it or not, this magic carpet can transport you to any place you like.
翻译： The patient was transferred to another hospital.
She translated poetry into English.
16. realistic adj.现实的，实际的
real adj. 真实的 really adv.实际上
reality n.现实 realize vt.实现
VR= ______________
The packaging should be changed so that it’s ____________（可回收的）. But let’s be realistic: we still need packaging.
virtual reality
recyclable
17. I think we need a more innovative solution. I really believe we should do away with packaging completely. There is a supermarket in Germany that has no product packagingbat all. Its customers take refillable containers with them when they shop, and use them instead of plastic boxes and bags.
innovative adj. 创新的 innovation n.创新
do away with 拜托，废除
fill——refill—— refillable adj.可再次填充的
contain v.包含——container n.容器