资源简介

(共16张PPT)
Revealing nature
Unit 5
B4U5
Developing ideas
The Secret Language of Plants
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”.
How does the writer develop the passage
Introduction
Conclusion
Using
the “wood wide web”
Using
sound
Using
chemicals
Plants can communicate.
Talk with plants.
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
2 What does “wood wide web” mean
Think & Share
It 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 What do you think are the benefits of studying plant
communication
Think & Share
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 What secrets do the two reading passages in this unit reveal and what do they have in common
Think & Share
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
3 Organise your ideas following the steps below.
4 Give a talk to the class about communication between living things.
Work in groups.
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.
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.
Activity 5
Read the observational journal and answer the questions.
1. 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 5 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(舌状花), the disk florets(盘心花) bloom across the core of the sunflower blossom. It is yellow, looking beautiful.
Activity 7
Smart expressions
微量的
呼救(名词短语)
赶走
植物报警系统
发出咔哒的声音
最令人惊讶得
在某些方面
通过……连接起来
把不同植物的根联结起来
植物之间相互交谈的秘密方式
tiny amounts of
a call for help
drive… away
the plant warning system
make clicking noises
most surprisingly of all
in some ways
by linked by …
link the roots of different plants to each other
the secret way in which plants talk to each other
that/不填

展开更多......

收起↑