北师大版 (2019)选择性必修 第一册Lesson 1 The Sixth Extinction优质课课件ppt

这是一份北师大版 (2019)选择性必修 第一册Lesson 1 The Sixth Extinction优质课课件ppt，共50页。PPT课件主要包含了Lead in，die out，消失绝迹灭绝，n 物种种，wipewaɪp，vt 擦试，massmæs，adj 大量的，n 小行星，vt 责怪职责等内容，欢迎下载使用。

Part 1—Lead in
Part 2—Wrds and Expressins
e.g. Hw did the dinsaurs die ut?
Wrds and Expressins
species/ˈspiːʃiːz/
e.g. There are n fewer than 100 different species in the area.
e.g. Wipe the surface with a damp clth.
wipe ut 彻底灭绝
unusual/ʌnˈjuːʒuəl/
adj. 异常的；不平常的
e.g. An unusual nise arrested his attentin.
e.g. I've gt masses f wrk t d.
varied/ˈveərid/
adj. 各种各样的，形形色色的
e.g. Peple's reactin t the film has varied greatly.
asterid/ˈæstərɔɪd/
e.g. Asterid lies between Mars and jupiter.
decrease/dɪˈkriːs/
n. 减少；减少的量vi.&vt. 减少
e.g. The number f new students decreased frm 210 t 160 this year.
blame/bleɪm/
e.g. It's nt gd enugh just t blame the unruly children.
be t blame 把……归咎于
affect/əˈfekt/
e.g. The new law will affect us all, directly r indirectly.
e.g. He had shwn himself careless f persnal safety where the life f his clleagues might be at risk.
endangered/ɪnˈdeɪndʒəd/
e.g. That ne mistake seriusly endangered the future f the cmpany.
slar/ˈsəʊlə(r)/
adj. 太阳光（能）的
e.g. Slar panels trap energy frm the sun.
hatch/hætʃ/
vi.&vt. (使)孵化
e.g. The eggs are abut t hatch.
restre/rɪˈstɔː(r)/
e.g. The plice are trying t restre public rder.
Part 3—Reading cmprehensin
Let’s read!
Read and think
After reading, let’s check Activity 1.
Read the text. Cmplete the ntes. Then talk abut the different aspects f extinctins.
Let’s check.
Extinctins, where entire species are wiped ut, are nt unusual in ur Earth’s histry.
ver 90% f all species that ever lived
These include the third mass extinctin, knwn as the” Great Dying”, which killed 90% t 96% f all species. And the fifth event, which ccured 66 millin years ag, caused the death f the dinsaurs.
The reasns:vlcanic eruptins, asterids hitting the Earth frm space, changes in sea levels, the decrease f the xygen cnten f the sea and glbal warming.
We have t change the way we live. Fr example, we need t take steps t save endangered species, including setting up special areas where plants and animals can be prtected. We need t change hw we wrk and travel by using cleaner, mre natural surces f energy. We als need t imprve ur farming methds t reduce water, air and land pllutin.
Read again. Answer the questins.
Let’s check.1 What did scientists find ut in 2015?
They fund that human activity is causing species t die ut 1,000 times faster than nrmal.
Let’s check.2 Why des the writer think the sixth mass extinctin will cme?
Because human activity has negatively affected all ther species n Earth, including aniamls and plants.
Let’s check.3 Why des the writer believe we’ll prbably die ut if 75% f the Earth’s species die ut?
Because ur wrld and ur lives depend n the balance in nature between animals and plants.
Let’s check.4 What did peple d in the case study t prtect black rbins? Which claim(s) did the case study supprt in the text?
Peple prtected Old Blue’s eggs, helped them t hatch, and tk care f the chicks. Peple are restring their habitats and remving pests like mice and cats frm the islands where they live.What we can d t prtect the sixth extinctin.
1. Use different clured pens t highlight at least ne example fr each f the fur elements listed belw in different clurs. Then find ut(1) what typical language is used?(2) What text type is this piece f writing?(3) What is its cmmunicative purpse?factsreasnspinins/ predictinsslutins
Pssible answers
pinins/ predictins
2. What ways f argument des the writer use t cnvince readers? Are yu cnvinced? Why r why nt?
citing ideas frm experts r authrities
giving examples
Part 4—Hmewrk