英语选择性必修 第二册Unit 5 A delicate world教案配套ppt课件

这是一份英语选择性必修 第二册Unit 5 A delicate world教案配套ppt课件，共22页。PPT课件主要包含了Part 1，food chain，Homework，Part 2等内容，欢迎下载使用。
Using language
1.What des “it” refer t in sentences in the fllwing sentences?
N visitrs wuld think it surprising that the island is a UNESCO Wrld Heritage Site.
Experts felt it necessary t cme up with a plan t remve all the rabbits frm the island.
that the island is a UNESCO Wrld Heritage Site
t cme up with a plan t remve all the rabbits frm the island
2.What is the difference between the sentences in each grup?
N visitr wuld think it surprising that the island is a UNESCO Wrld Heritage Site.
N visitr wuld think that the island being a UNESCO Wrld Heritage Site is surprising.
Experts felt t cme up with a plan t remve all the rabbits frm the island was necessary.
Lk fr mre sentences with this structure in the reading passage, and summarise its use in yur wn wrds.
This incident made it clear that the rat, muse and rabbit prblem needed slving nce and fr all.
Read the passage n P53, then answer the fllwing questins.
1. Why is it a big issue t release the pet red-eared slider int the wild?
2. What shuld yu d if yu are unable t keep it?
Rewrite the underlined parts using it as an empty bject.
many peple think it a gd idea t keep this turtle as a pet
believe it n big issue t release them int the wild
peple have fund it a threat t ther species t release these turtles int the wild
Experts cnsider it imprtant fr wners t keep their pets in an enclsed area
Lk at the pictures f the Sailhanba Natinal Frest Park and describe its changes using it as an empty bject where apprpriate.
Describe the changes using it as an empty bject.
Grup discussin
Describe the changes f Zhengzhu using it as an empty bject.
What des the diagram shw?
primarycnsumer
fungibacteria
secndarycnsumer
What are the relatinships between the living things?
② Primary cnsumers feed n prducers.
① Secndary cnsumers prey n primary cnsumers.
③ Prducers absrb light and water. They als absrb disslved nutrients frm the sil, which are prvided by decmpsers.
④ Decmpsers break dwn dead animal and vegetable matter int nutrients.
Cmplete the passage with the crrect frm f the wrds and expressins in Activity 5.
Draw a fd chain in a wdland ecsystem in grups.
1. One f the ldest species in the ecsystem, the hney bee has been in existence fr millins f years.A. Hundreds B. thusands C. millins
2. A hney bee can fly as fast as kilmetres per hur and its wings can beat times per secnd.A. 2.4; 20 B. 2.4; 200 C. 240; 2000
3. In just ne jurney t cllect pllen and nectar, ne single hney bee can pllinate as many as flwers.A. 2.4; 20 B. 2.4; 200 C. 240; 2000
pesticides and climate change
wuld die ut
Other insets
be unable t reprduce
have fallen by 12%
declining very quickly
bees are respnsible fr pllinating abut 70%
It’s a fact!Dn’t frget that…Check it ut fr yurself…
Yu must be kidding!I dn’t believe it!Are yu sure abut…?
Wrk in grups. Talk abut what wuld happen t the ecsystem if anther species died ut.