高中英语外研版 (2019)选择性必修 第一册Unit 5 Revealing nature背景图ppt课件

这是一份高中英语外研版 (2019)选择性必修 第一册Unit 5 Revealing nature背景图ppt课件，共34页。PPT课件主要包含了is home to，scientific，habitats，ecosystem，appearance，primitive，ancestor，bacteria，cell，break down等内容，欢迎下载使用。

Using language Listening
Learning bjectives
1. Get the main idea f the passage and list expressins related t bidiversity by reading.2. Get the main idea f the listening material and write dwn useful expressins related t the tpic f cells and bacteria.3. Act ut the cnversatin abut cells and bacteria.4. Make a new cnversatin abut bidiversity.
What is bidiversity in yur mind?
Reading fr infrmatin
The main idea f the passage:It intrduces the largest animal species: the blue whale and the tughest species — the water bear and their characteristics.
1. What species are mentined and what is special abut them?2. What ther unusual life frms d yu knw f?
1. What species are mentined and what is special abut them? Earth is hme t millins f different species. Sme can be very small, like bacteria and viruses, which are s small that we cannt see them with nly ur eyes. By cntrast, the largest animal species s far fund n ur planet is the blue whale, which can grw up t almst 30 metres in length and weigh ver 130,000 kils.
1. What species are mentined and what is special abut them? The tughest species is prbably the water bear. This tiny rganism can survive temperatures frm 150℃ t a belw freezing -272℃. T best survive in their envirnment, each species has develped its wn unique physical characteristics.
1. What species are mentined and what is special abut them?Tw species are mentined: The blue whale and the water bear. The blue whale is the largest animal species n earth, which can grw up t almst 30 metres in length and weigh ver 130,000 kils. The water bear is the tughest species, which can survive in extreme temperature.
2. What ther unusual life frms d yu knw f?Vipers, elephants and pandas are very unusual. Yu can have yur wn answers.
A map f the Galapags Islands
Trtises, mangrves and iguanas are mentined.
Find ut the species mentined.
ancestr scientific be native t primitivehabitat appearance be hme t ecsystem
Cmplete the paragraphs.
The Galapags Islands are renwned wrldwide fr their unique bidiversity. The Giant Trtise Reserve n Santa Cruz several species f giant trtise that the Galapags Islands. The island is als hme t the Charles Darwin Research Statin, where studies are carried ut.
are native t
Mangrves are ne f the castal plants that grw n Isabela. They serve as the fr varius birds and fish, and are very imprtant t the .
Iguanas can be fund n San Cristbal. They have a very special , with cmb-like spines n their back. There is evidence that all the different iguanas have develped frm mre nes and share a cmmn .
1. The existence f a large number f different kinds f animals and plants which make a balanced envirnment.2. The simplest and smallest frms f life. 3. Oganics.
bidiversity
rganic matters
Useful Wrds
4. The system in yur bdy that prduces substances t help it fight against infectin and disease.5. All the plants and living creatures in a particular area cnsidered in relatin t their physical envirnment.6. The smallest unit f living matter that can exist n its wn.
immune system
When yu listen t the pdcast, it is imprtant t find ut the purpse f it. Befre listening, think abut what tpics might be discussed. The main idea f the passage is:
smething abut cells and bacteria.
Listening fr main idea
1. Bidiversity is imprtant.2. Bacteria are always harmful t humans.3. Sme species f bacteria are used in fd prductin.4. Many species f bacteria recycle dead rganic matter.5. Our immune systems are able t fight ff all germs.
Listen and chse the statements that are made.
During the pdcast, listen carefully t each questin and try t understand the main ideas within the respnses.
Learning t learn
As yu listen, make ntes f key infrmatin such as key wrds, numbers and facts. This will help yu understand and remember the infrmatin yu hear.
Every living thing is 1 . They are like 2 .In the human bdy there are abut 3 human cells and arund 4 bacteria cells. Mst bacteria in the human bdy can 5 .In the fd prductin prcess, bacteria can 6 dead rganic matter.
Listening fr detailed infrmatin
Every living thing is . They are like .In the human bdy there are abut human cells and arund bacteria cells. Mst bacteria in the human bdy can .In the fd prductin prcess, bacteria can dead rganic matter.
made up f cells
bricks that are used t build huses
thirty trillin
help digestin
thirty-nine trillin
D yu knw Have yu heard By the way, … In fact, ... Actually, Speaking f which,...
The useful expressins
Checking backgrund knwledge D yu knw Have yu heard f infrmatin By the way, … Actually, In fact, Speaking f which, ...
Student’s wrk
survey methd experimental methdbservatin methdassess t infrmatin