(共38张PPT)
Unit 5
Unit 5
Revealing nature
Biodiversity
To listen for main idea and specific information.
To summarize a conversation and make a presentation.
To read and think critically, giving more examples on the topic.
To develop the awareness of respecting the ecosystem.
March 3rd marks World Wildlife Day, a day dedicated by the United Nations to raise awareness for the protection of wildlife and biodiversity, which are essential to human survival. The 2025 theme is “Wildlife Conservation Finance: Investing in People and Planet”(野生动植物投融资：投资于人类与地球). Enjoy a video.
What is biodiversity
1. biodiversity 生物多样性 (biology+diversity)
2. bacteria (pl.)细菌 (single) bacterium
3. species 物种
4. organic matter 有机物
5. immune systems 免疫系统
6. ecosystem 生态系统
7. cell 细胞
Some useful words and expressions you may meet in your listening:
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.
Cells
Every living thing is ________________. They are like ________________________________.
In the human body there are about _____________ human cells and around __________________ bacteria cells.
Bacteria
Most bacteria in the human body can ___________________.
In the food production process, bacteria can ____________ dead organic matter.
made up of cells
bricks that are used to build houses
thirty trillion
thirty-nine trillion
help with digestion
break down
Discuss what you know about cells and bacteria.
Complete the boxes with the expressions from the podcast.
Checking background knowledge
Do you know about... Have you heard of ...
By the way, … In fact,....
Actually, .... Speaking of which, ...
Adding information
Do you know about ...
Have you heard of ...
By the way, …
Actually, ...
In fact, ...
Speaking of which, ...
Read the passage and answer the questions.
What species are mentioned and what is special about them
2. What other unusual life forms do you know of
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℃ to a below freezing -272℃.
Complete the paragraphs with the correct form of the words and expressions in the box.
1
The Galápagos Islands are renowned worldwide for their unique biodiversity. The Giant Tortoise Reserve on Santa Cruz 1 __________ several species of giant tortoise that
2 ____________ the Galápagos 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
ancestor scientific be native to primitive habitat appearance be home to ecosystem
2
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 ___________.
3
Iguanas can be found on San Galápagos. They have a very special 6 __________, with comb-like spines on their back. There is evidence that all the different iguanas have developed from more 7 _________ ones and share a common 8 _________.
habitats
ecosystem
appearance
primitive
ancestor
ancestor scientific be native to primitive habitat appearance be home to ecosystem
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. Do online research to find more information.
Have you ever heard of the peacock in the southwestern China
I know the habitat is hot and wet. Do you know anything about the appearance of them
Useful expressions:
species
ecosystem
biodiversity
scientific
primitive
habitat
appearance
be native to …
Supplementary information
The mammal yaks can live in the highest plateau, mainly in the Himalayas and Tibetan Plateau. Yaks, usually dark brown or black in color, have very long and thick fur covered all their bodies. Their limbs are short but strong. All these characteristics make yaks can live in the area of 3000-5000 metres above sea level and 30-40 degrees below
zero. Nearly 85% of yaks
in the world are living in
China.
Diversiform-leaved poplar trees (胡杨林) mainly grow in 20 countries, including Mongolia and some on the Mediterranean. Xinjiang grows 91 percent of diversiform-leaved poplar trees in China. The trees are estimated to have a history of three million years, according to its fossils found in 1935 in Xinjiang and neighboring Gansu province.
However, During the 1960-1970 period, large areas of diversiform-leaved poplar trees were felled (砍伐树木) in some areas in Xinjiang to make room for farming, greatly deteriorating the local ecological environment with desert incursion into oases (绿洲). Introduction of laws and policies, along with increasing protection awareness among the public, have kept the rare trees from destruction.
Peacocks are mainly found in Yunnan province, in the southwest of China. According to a survey by the Kunming Institute of Zoology, part of the Chinese Academy of Sciences, fewer than 500 of the green peacocks may still exist, and it has now become one of China’s most endangered wildlife species, even rarer than the giant panda.
Siberian tigers, otherwise known as Amur or Manchurian tigers, mainly live in eastern Russia, Northeast China and
the northern part of the Korean Peninsula.
Forest and mountain areas in the eastern part of Jilin have long been the habitat for Siberian tigers, and a monitoring center has been established covering 500 square meters to keep track of the animals.
In recent years, wild Siberian tigers have been sighted frequently in the region thanks to its improving natural environment.
Official statistics show Jilin currently has 42 nature reserves covering 2.61 million hectares (公顷) of land, and accounting for 13.9 percent of all land of Jilin.
Dawn redwood trees (水杉) are large fast-growing Chinese monoecious (雌雄同株的) tree having flat bright-green deciduous (树木每年落叶的) leaves and small globular cones (球果) .
Also known as the metasequoia, the tree is native to Hubei, Hunan and Sichuan provinces and widely regarded as a living fossil since its existence dates back to the Cretaceous (白垩纪的) period, but has been planted in a vast regions across China that are south of Beijing in recent years to be used for harvesting and for ornament. It has high academic value as one precious relic plant.
Now talk about what methods you used to collect the information pare your methods with your partner’s and think about which methods are more efficient.
How many species did you learn
What is special about them
How can we check background knowledge or add information in a conversation
What is biodiversity in your mind now
I. 根据句意及提示，写出该单词的正确形式（每空一词）。
1. Living conditions in the camp were pretty ________ (原始的).
2. His interest in the project ________ ( 减少) after his wife died.
3. In 2009, researchers produced a clone of the extinct ________ (山羊) species Pyrenean ibex.
4. Officials believe that more than one person may be to ________ (责怪) for the fire.
5. The male bird displays several c____________ which distinguish him from the female.
primitive
declined
goat
blame
characteristics
1. It's known to us that the kangaroos ________________ Australia.
2. I wish he could afford to ________________ his plan.
3. Have you ________________ a TV program called Lie to Me It is very popular.
4. —Are you ready for the party tomorrow
—Yeah, I am! ________________, did you buy the cake yet
are native to
II. 用方框内合适的短语并用其正确形式填空。
by contrast, speak of, fight off, by the way, carry out, hear of, be native to
carry out
heard of
By the way
5. I think we've discussed everything we need to — ________________ which, what time is it
6. I was trying to ________________ the urge to go to the kitchen secretly for something to eat.
7. In the south much of the land is flat. ________________, in the north there are hills and mountains everywhere.
speaking of
by contrast, speak of, fight off, by the way, carry out, hear of, be native to
fight off
By contrast
III. 阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。选项中有两项为多余选项。
A. Nature slows down time.
B. Nature offers solutions to climate risks.
C. Nature gives you inner peace and a lot of ideas.
D. It offers you an understanding of the cycle of life.
E. In fact, everyone desires to have cleaner air every moment.
F. You have an influence on your children in their attitudes to nature.
G. It is not just a place for activities because it has something more to offer.
There are many reasons why we need to take our time to explore nature and discover things around it. 1. __________
G
Nature offers fresh air. In a highly urbanized (城市化) place, fresh air isn't completely enough. 2. __________ Nature can provide unlimited fresh air, and it is one of the significant benefits a person could have.
A. Nature slows down time.
B. Nature offers solutions to climate risks.
C. Nature gives you inner peace and a lot of ideas.
D. It offers you an understanding of the cycle of life.
E. In fact, everyone desires to have cleaner air every moment.
F. You have an influence on your children in their attitudes to nature.
G. It is not just a place for activities because it has something more to offer.
E
3. __________ People are always busy doing a lot of daily activities and sometimes lose track of how much time they have spent on their work. However, nature teaches us harmony and balance as it slows down time when you focus on giving yourself a break.
A. Nature slows down time.
B. Nature offers solutions to climate risks.
C. Nature gives you inner peace and a lot of ideas.
D. It offers you an understanding of the cycle of life.
E. In fact, everyone desires to have cleaner air every moment.
F. You have an influence on your children in their attitudes to nature.
G. It is not just a place for activities because it has something more to offer.
A
Nature produces inspiration. Being in nature can make you focus on things you need to do. You can choose to paint or write outdoors. 4. __________
A. Nature slows down time.
B. Nature offers solutions to climate risks.
C. Nature gives you inner peace and a lot of ideas.
D. It offers you an understanding of the cycle of life.
E. In fact, everyone desires to have cleaner air every moment.
F. You have an influence on your children in their attitudes to nature.
G. It is not just a place for activities because it has something more to offer.
C
Nature makes you appreciate life. There are a lot of things you can discover through nature. 5. __________ It inspires you to think how each creation connects with each other. It teaches you to value even the smallest thing you can find in the world. Nature can show you that life is lovely and exciting.
A. Nature slows down time.
B. Nature offers solutions to climate risks.
C. Nature gives you inner peace and a lot of ideas.
D. It offers you an understanding of the cycle of life.
E. In fact, everyone desires to have cleaner air every moment.
F. You have an influence on your children in their attitudes to nature.
G. It is not just a place for activities because it has something more to offer.
D
Illustrate another unusual life form and biodiversity in China. You may use the newly learned words and expressions:
some species, organic matter, germ, bacteria, cell, be home to, be native to, primitive, ancestor, ecosystem, by the way, in fact, actually...
