外研版（2019） 选择性必修第一册 Unit 5 Revealing Nature Using language 课件(共23张PPT)

(共23张PPT)
Using language
Biodiversity
重点词汇：
1.____________________n.特征,特性 2.___________________________v.减少
3.___________v.责怪,指责;把……归咎于
4.goat n._________ 5.primitive adj.________
6.giant adj.___________7. tortoise n.__________ 8. 遍及全世界 adv._____________
characteristic
decline/ decrease/ reduce
blame
山羊
原始的
巨大的
陆龟
worldwide
II.重点短语：
1.be native to ___________________
2.in the end_________________
3.be home to __________________
4.by contrast_______________
5.up to __________
6.do research on________________
源于...的；原产于
最后，终于
是...的栖息地；是...的家园
相比之下
多达，忙于，胜任，由...决定
研究
II.重点短语：
7. be harmful to _______________
8. fight off_______
9.carry out________________
10.be blamed on ______________
11. in particular______　
对...有害
击退
实施，执行
被归咎于
尤其，特别
1.The extinction of the Pinta Island tortoise is blamed on humans.(教材P53)平塔岛龟的灭绝被归咎于人类。
【词汇精讲】 blame v.________
n. __________
翻译：The government has been widely blamed for the crisis.
The company refused to accept any blame for the damage.
责怪，把...归咎于
责备，责怪
政府因这次危机受到广泛指责。
这家公司拒绝为损害承担任何责任。
【词汇拓展】
be to blame (for...) ...应(为……)负责任
blame sb for sth 因某事责备某人
blame sth on sb 把某事的责任归咎于某人
take the blame for sth. 为某事承担责任
put the blame on ...把责任归咎于...
【牛刀小试】
She was blamed _______ breaking the window.
He is always putting the blame _________ someone else.
A spokesman said that bad weather was _____ __________ ______ the delay.
I’ll ______ ____ _______ ____ the failure of the project because I am in charge.
for
on
to
blame for
take the blame for
2.After goats in particular had been brought to the island,the Pinta Island tortoise population declined.(教材P53) 特别是山羊被带到岛上之后,平塔岛龟的数量下降了。
【词汇精讲】decline v. / n. _________________
翻译：As one grows older , his memory declines.
There has been a sharp decline in profits this year.
减少，下降，
衰退， 婉言谢绝
人的记忆力随着年龄的增长而衰退。
今年的利润大幅度下降。
【词汇拓展】
in decline 在衰退中
on the decline在衰退中,走下坡路
decline to do sth拒绝做某事
【牛刀小试】
The population is _____ ______ _________.
At that time the Roman Empire was ___ _________.
He declined ____________(answer) my questions.
on the decline
in decline
to answer
Listen to the podcast and fill in the blanks.
Every living thing _____ _______ ______ _____cells. They are like ________ that are used to build houses. Most microorganisms(微生物) are single-celled. This means that they ___________ ______ just one cell. In fact, an average human body contains about _______ trillion human cells, and around _______________ trillion bacteria cells. Most of the bacteria in your body _______ ________digestion(消化). Bacteria ________ _______ this waster and other dead organic matter, like ___________ leaves, into nutrients. Although some of the bacteria may cause ______________ in humans, plants and animals, they aren't all bad.
is made up of
bricks
consist of
thirty
thirty-nine
help with
break
down
fallen
diseases
Listen to the podcast and choose the statements that are made.
1 Biodiversity is important.
2 Bacteria are always harmful to humans.
3 Some species of bacteria are used in food production.
4 Many species of bacteria recycle dead organic matter.
5 Our immune systems are able to fight off all germs.
Listen again and complete the fact sheet.
thirty trillion
thirty-nine
trillion
made up of cells
bricks that are used to build houses
help with digestion
break down
Do you know about......
Have you heard of ......
Complete the boxes with the expressions from the podcast.
By the way......
Actually......
In fact,......
Speaking of which,…
Checking background knowledge
Adding information
What species are mentioned and what is special about them
Two species are mentioned:the blue whale and the water bear.
The blue whale is the largest animal species on Earth, which can grow up to almost 30 metres in length and weigh over 130,000 kilos.
The water bear is probably the toughest species, which can survive temperatures from 150 C to a below freezing -272 C.
The Galapagos Islands are renowned worldwide for their unique biodiversity. The Giant Tortoise Reserve on Santa Cruz 1_________ several species of giant tortoise that 2__________ the Galapagos Islands. The island is also home to the Charles Darwin Research Station, where 3____________ studies are carried out.
is home to
are native to
scientific
Complete the paragraphs with the correct form of the words and expressions in the box.
ancestor scientific be native to primitive habitat appearance be home to ecosystem
Mangroves are one of the coastal plants that grow on Isabela. They serve as the 4__________for various birds and fish, and are very important to the 5________.
habitats
ecosystem
Lguanas can be found on San Cristobal. They have a very special 6___________, with comb-like spines on their back.
appearance
primitive
ancestor
There is evidence that all the different iguanas have developed from more 7_____________ ones and share a common 8____________.
Look at the pictures of the species native to different regions of China.
Talk about biodiversity in China using the words and expressions in this section.
反馈达标：
1. The old man was badly injured but was saved _______
the end.
2. He promised to us that he will carry________the plan
in spite of the difficulties.
3. In autumn and spring ,_______ contrast , stocks usually
rise.
4. Such water would not be native_______ the moon.
5. The surrounding forests are home_______ many birds
and animals.
in
out
by
to
to
反馈达标：
6.Scientists are confident that this climate change can be
blamed ________ human activities.
7. She likes fruit and lemons ______ particular.
8. Smoking is harmful ________ our health.
9. It is important to do research____________ the theory.
on
in
to
on
Thank you!