(共10张PPT)
Unit 5 Revealing nature
Developing ideas
新标准《英语》高中选择性必修第一册
Activity 1
Now talk about what else you think the plants can do and give examples.
Look at the pictures and tick what plants can do.
attack
breathe
eat
sleep
move
speak
steal
think
√
√
√
√
√
Activity 2
Read the passage and find out the
ways in which plants communicate.
They may communicate with each other by using chemicals, sound and “wood wide web”.
Activity 3
Complete the diagram.
communicate with each other
from the leaves
release its own, different chemicals
with their roots
tell if a neighbouring plant is helpful, or unfriendly
clicking noises when there is not enough water, indicating drought is arriving.
the roots of different plants to each other
share information and even food
steal food from each other, or spread poisons
Think & Share
1 What figure of speech is being used when the plants are described as calling for help What is its function
2 What does “wood wide web” mean
3 What do you think are the benefits of studying plant
communication
4 What secrets do the two reading passages in this unit reveal and what do they have in common
1. Personification. It can make descriptions more vivid.
2. “wood wide web” refers to an amazing system of communication that can link nearly every plant in a forest. It is linked underground by fungi and this fungal network links the roots of different plants to each other. Using the wood wide web, plants can share information and even food with each other.
3. It will help us know more about the world of plants and then get a better understanding of the secret of nature and encourage us to explore more about the mysterious nature. What’s more, it will teach us an important lesson, that is, human should live in harmony with mother nature. And it is our responsibility to fulfill the mission.
4. Passage 1 reveals the secret of evolution and Passage 2 reveals the secret of communication between plants. They all reflect that there are numerous secrets in nature that are waiting to be explored.
Activity 4
1 Read the passage again and talk about how plants communicate.
2 Think about and discuss the following ways of communication in the animal world. What other ways can you think of
Bees “dance” to signal to other bees that they have found food.
Ants communicate with each other through touch, chemical signals, moving their bodies and even using their legs to make sounds.
3 Organise your ideas following the steps below.
Begin with what living things you have chosen to talk about.
Explain how they communicate and give examples.
Conclude by explaining what we have learnt from their behaviour.
4 Give a talk to the class about communication between living things.
Work in groups.
Now talk about how well you contributed to your group discussion and help each other to make improvements.
Activity 5
Read the observational journal and answer the questions.
How were the daffodil bulbs planted
They were planted side by side in soil with the pointed ends facing up.
2. In what environment did the leaves grow
The leaves grew in a sunny, but cool place.
3. What do the flowers look like
The flowers are yellow and white,and shaped
like trumpets.
Activity 6
Work in pairs.
Look at the pictures and talk about how the sunflower grows.
Write your observational journal about the sunflower.
Activity 7
Work in pairs.
Make improvements to each other’s observational journals and share them with the class.
An observational journal about the sunflower
1 June
Germination （使发芽）
Covered with 1/2 cm of moist soil, the sunflower seed takes five to 12 days to come up after being planted. Water has been added regularly and the hard seed coat softens in the damp soil to allow the first root to pierce downwards and the
first leaves to push to the soil surface.
6 July
Growth
The root continues to grow downward. The single stem grows hollow and smooth, revealing large spade-shaped leaves from the growing tip. Gradually, the plant‘s growing tip reveals the first hints of development of the flower bud. The
plant stem becomes more woody.
26 July
Flowering
About three weeks after the flower bud first becomes visible at the tip of the sunflower stem, it enlarges and begins to reveal a flattened disk. Over the course of one week, the yellow ray florets, the disk florets bloom across the core of the sunflower blossom. It is yellow, looking beautiful.(共4张PPT)
Unit 5 Revealing nature
Starting out
新标准《英语》高中选择性必修第一册
Activity 1
Look at the page from a science
magazine and answer the questions.
1. What do you know about these animals
What makes them special
Komodo dragon: It evolved in Australia and spread westward …
Duck-billed platypus: The oldest discovered fossil of it dates back to about 100,000 years ago …
Nautilus: It often considered “living fossils” …
They are all species that exit thousands of years on earth; They are old and rare (unusual).
2. What other similar animals do you know about
Share your knowledge with the class.
Activity 2
1. How can seeds travel How can this benefit plants
Seeds usually are carried by the wind, water, and animals.
Plants can have a better chance at life.
2. Can you think of another example of seeds travelling Share it with the class.
Dandelion seeds have little parachutes to catch the wind and go further;
Humans can spread seeds if seeds get stuck to their clothing or shoes.
Watch the video and answer the questions.(共9张PPT)
Unit 5 Revealing nature
Understanding ideas
新标准《英语》高中选择性必修第一册
Activity 1
Look at the evolutionary tree and answer the questions.
1 What species do you recognise in the picture
Paramecium, earthworm, snail, crab, fish, tortoise,
bird, horse, human, frog...; alga, moss, fern, plant...
2 What factors can cause the process of evolution
The ever-changing environment of nature; environmental changes; population immigration; genetic mutation; cultural preferences...
Activity 2
Read the passage and talk about your
understanding of the title.
Activity 2
Most commonly, people believe that a journey means a trip from one place to another, especially over a long distance and literarily a journey refers to the process by which something gradually changes and develops. The title may indicate that Darwin’s research work leading to his discovery of evolution and the origin of species
took quite a long time and
great efforts, determination
and courage to achieve.
Activity 3
Choose the main idea of the passage and give your reasons.
1. Darwin’s interest in various living things made him a great naturalist.
2. Darwin’s journey on the Beagle inspired his Theory of Evolution.
3. Darwin went on a journey to confirm his theory that humans had evolved over time.
The title of the passage is “a journey of discovery”. So the passage is mainly about how Darwin’s Theory of Evolution generated and developed on his journey on the Beagle.
Activity 4
Number the puzzle pieces in order.
Organise information from the passage and complete them.
1
4
2
3
5
1 On his journey on the Bealge:
various living things in their natural environments and samples of the plants and animals he had collected.
very similar to each other.
2 Generate ideas
come to exist
Maybe animals evolved as they adapted to their changing environments？
3 Look for more evidence
that there was a difference between the finches on each of the islands.
had evolved according to what food was available on that particular island.
4 Develop ideas
had evolved from a common ancestor, which had arrived on the islands a long time before
slowly evolved into many new species.
5 Propose a theory
had evolved from lower forms of life.
Activity 4
Now discuss why Darwin did not publish his Theory of Evolution until 1859, about twenty years after his discovery？ Do further research if necessary.
1. At that time, many people believed that all species had appeared on Earth at the same time and had not changed since, but Darwin’s theory proposed that living things, including humans, had evolved from lower forms of life, which, as a result, shocked many people.
2. Darwin was a determined man. He had strong curiosity and interests in science and was good at thinking and making discoveries.(共15张PPT)
Unit 5 Revealing nature
Using language
新标准《英语》高中选择性必修第一册
Past perfect
Activity 1
Look at the sentences from the reading passage and
answer the questions.
1. In sentence (a), which action happened first, “suspected” or “evolved from a common ancestor”
“evolved from a common ancestor.”
2. In sentence (b), which action happened first, “refused to believe” or “evolved from lower forms of life”
“evolved from lower forms of life.”
3. What does the structure had done indicate
It indicates the action happened before a certain past action.
Activity 1
Now look for more sentences with the past perfect tense in the reading passage, and summarise its use in your own words.
1. It was a young man who had left medical school without completing his degree.
2. ... he had recently received a letter from his father predicting that he would be “a disgrace to yourself and all your family.
3. After Darwin had spent some time in South America, his room on the ship was crowed with samples of the plants and animals he had
collected.
4. At that time, people believed that all species had appeared on Earth at the same time, and had not changed since.
5. It seemed their beaks had evolved according to what food was available on that particular island.
6. Over time, it had slowly evolved into many new species.
Activity 2
1. began
2. had led to
3. developed
4. chose to
5. had made
Complete the paragraphs with the information from the given sentences.
Activity 3
Complete the online encyclopaedia entry with the correct form of the words in the box.
Compete decline eat
Live introduce arrive
had lived
eaten
had introduced
competed
declined
arrived
Activity 4
Act out a role-play using the information in Activity 3.
One of you will play the keeper of Lonesome George, and the other will play the reporter asking about George.
Use the past perfect tense where appropriate.
Work in pairs.
Biodiversity
Activity 5
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.
Activity 6
Listen again and complete the fact sheet.
Discuss what you know about cells and bacteria in pairs.
thirty trillion
thirty-nine trillion
made up of cells
bricks that are used to build houses
help with digestion
break down
Activity 7
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
Answer the questions.
Activity 8
1. 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.
2. What other unusual life forms do you know of
Activity 9
is home to
are native to
scientific
habitats
ecosystem
appearance
primitive
ancestor
Complete the paragraphs with the correct form of the words and expressions in the box.
Activity 10
Work in pairs.
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.
