外研版 (2019)选择性必修 第二册Unit 5 A delicate world示范课课件ppt

这是一份外研版 (2019)选择性必修 第二册Unit 5 A delicate world示范课课件ppt，共33页。PPT课件主要包含了Penguins，ACTIONS，PURPOSES，RESULTS，E ，A ，D ，harmony，Cats，parakeets等内容，欢迎下载使用。
Unit 5A delicate wrld
T get the detail infrmatin f the passageT knw hw the animals damaged the islandT knw what peple did t slve the prblemThink hw t tackle the prblem
What have yu knw abut penguins?
Penguins live arund the Suth Ple. They usually spend all their waking hurs in the water. Only during the egg-laying and mating perids d penguins actually live n land. Penguins cmmnly are black with black heads and white breasts. Large penguins ften stand abut 3 feet in height.
1 Lk at the picture belw and answer the questins.
1. What animals can yu see in the picture?
2. What kind f changes wuld take place if cats, rats and rabbits were intrduced t an envirnment like this?
Maybe they culd make the envirnment mre active and diverse.
Maybe they wuld hunt the birds and eat the native vegetatin, thus upsetting the lcal eclgical balance.
Read the title and lk at the picture. Predict what the passage is mainly abut.
MACQUARIE ISLAND:frm Chas t Cnservatin
Macquarie Island lies in the Suth- west Pacific Ocean, halfway between Australia and Antarctica. Its native inhabitants encuntered challenges. Human interventin led t the ersin f the riginal habitat, cased chas and destryed the eclgy dramatically.
2 Read the passage and find ut what happened t Macquarie Island.
Read the tpic sentences;Link the tpic sentences tgether t get the main idea f the passage;Draw the utline f the passage;
Match the main idea with its crrespnding paragraph.
What happened t the Macquaire Island?
Nn-native species intrduced t Macquarie Island attacked native birds, and led t a substantial reductin f bird ppulatin and even the extinctin f parakeets. In additin, nn-native species ate and devastated the native vegetatin. All f this played a part in upsetting the natural harmny f the island. But nw the island’s eclgy is n the rad t recvery with human effrts.
3 Chse the authr's purpse in writing the passage and give yur reasns.
1. T analyse hw Macquarie Island was saved frm destructin.2. T infrm readers f the chas caused n Macquarie Island by humans.3. T entertain readers with a funny stry abut what happened n Macquarie Island.4. T suggest ways in which an ecsystem can be prtected.
4 Organise infrmatin frm the passage and cmplete the flw chart.
Humans arrived n Macquarie Island.
T live there.
T cntrl the rats and mice.
Rats and mice were brught there by accident, and _______.
Rabbits multiplied and caused sil ersin, and ________.
Rats and mice were brught there by accident, and ________________________________________________________________________________
they tk ver the island, eating the bird’s eggs and attacking baby birds.
Cats were brught t the island.
The cats develped an appetite fr the birds.
Rabbits multiplied and caused sil ersin, and ________________________________________________________________________________________________________________________________________
Rabbits were intrduced t the island.
T prvide fd fr humans.
the explding rabbit ppulatin prvided plentiful fd fr the cats. This led t mre cats hunting the birds. As a result, parakeets died ut in 1891.
A virus was released nt the island.
T remve all the rabbits frm the island.
Substantial reductin f rabbit ppulatin led t cats killing mre native birds.
Traps and dgs were used.
T catch the cats.
The departure f the cats resulted in an increasing ppulatin f rats and mice. And the rabbit ppulatin explded nce again.
Pisns and dgs were used.
T remve all the remaining invading species.
The island was pest-free and its eclgy is n the rad t recvery.
Decide whether the fllwing statements are True(T) r False(F).
1. Macquarie Island is a UNESCO Wrld Heritage Site because f its wild and natural beauty. (   )2. Humans intentinally brught rabbits, rats and mice t the island.  (   )3. Humans brught cats t the island t cntrl the rats and mice. (   )4. The rabbits had n immunity t the virus released nt the island, s they died ut sn. (   )
5. Humans learned a lessn frm the incident: the rat, muse and rabbit prblem needed slving cmpletely.  (   )6. The prgramme that the authr is t participate in will easily tackle the island's prblems.  (   )
A. meaning that the number f cats als increasedB. killing up t 60,000 each yearC. giving it a wild and natural beautyD. slving nce and fr allE. eating the birds’ eggs and attacking baby birds.
1. The green grass and bare rck f its landscape cntrast dramatically, _________.2. Rats and mice quickly tk ver the island, ________.
Cmplete the sentences.
3. The explding rabbit ppulatin prvided plentiful fd fr the cats, _________.4. The cats in cnsequence turned their attentin – and their stmachs – back t the native birds, _________. 5. The incident made it clear that the rat, muse and rabbit prblem needed, _________.
Belw is a summary f the text with sme cntent missing. Chse the right item frm the bx and make the summary cmplete.
cat, explde, invade, parakeet, harmny, penguin
Macquarie Island's native inhabitants have existed in perfect 1. ________ fr thusands f years. Hwever, humans arrived n the island with rats and mice, which ate birds. 2. ________ were brught t cntrl mice, but they als ate birds. Mrever, rabbits were brught in as fd fr humans,
but their digging caused sil ersin and increased cat ppulatin because cats als ate rabbits. Eventually, the cats als ate 3. ________, which led t their extinctin. In the 1980s, traps and dgs were used t catch the cats, and the last cat was finally caught. Withut cats, the ppulatins f mice, rats, and rabbits 4. ________ again. The rabbits' digging caused the land t cllapse and killed many 5. ________. Finally, humans used helicpters t drp pisn in rder t remve the last remaining 6. ________ species. In the end, Macquarie Island was pest-free and the island's eclgy is finally n the rad t recvery.
Nw talk abut hw human interference led t such severe cnsequences fr Macquarie Island.
1. What is yur understanding f “ ... we humans we it t the island t give it a happy ending” ?
Nature has its wn rules f living. But humans cming caused the destructin f the balance. Because f humans interventin, animals culdn't have their wn way f living. S we shuld whatever we can t make up fr ur mistakes and give nature back t all the living things.
2. D yu think it was right t eradicate the “pests” frm Macquarie Island? Give yur reasns.
If yu agree with the idea, yu can use what peple d in the passage t help yu.
If there's nly ne species n the island, d yu think it is better t the envirnment?
3. Hw culd similar situatins be avided in the future?
T avid similar situatins in the future, we shuld prtect the natural ecsystem and be aware f the ptential impact that human activities can have n ecsystems.
4. What language can yu use t talk abut cause and effect? Hw wuld yu apply it t yur reading and writing?
Nature, t be cmmanded, must be beyed. -- Francis BacnOnly t bey nature in rder t vercme nature. -- Charles DarwinWe wn't have a sciety if we destry the envirnment. -- Margaret Mead
Why is eclgical balance imprtant?Hw can human beings keep eclgical balance?