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(共14張PPT)
Unit 3 Trees and us
主題范疇：
人與自然
主題群：
環境保護
子主題：
熱愛與敬畏自然，與自然和諧共生
Key question
Why do we need trees
understand what trees do for us.
identify amazing facts about trees.
describe what we can do to help protects trees.
explain the relationship between trees and humans.
Unit objectives 單元目標
I can:
New words and phrase
communicate v. 溝通；交流
species n. 種；物種
communicate with 與……溝通
Pre-Listening
How much do you know about trees Discuss the questions below.
(1) How do trees communicate with one another
(2) Do trees have families and relatives like us
(3) What makes trees grow better and stronger
Do you know what is “podcast”
內容形式：
Podcast的內容可以是音頻、視頻或兩者的結合。音頻形式的Podcast最為常見，通常包括訪談、講座、故事敘述等。視頻形式的Podcast則可能包含更多的視覺元素，如演示文稿、動畫或現場錄制的內容。
Background
Podcast，中文譯為“播客”，是一種數字媒體發布方式，允許用戶通過互聯網訂閱并自動接收音頻或視頻文件。
定義與特點：
Podcast結合了“iPod”（蘋果的一款便攜式音樂播放器，現已擴展為泛指任何能播放音頻或視頻的設備）和“broadcast”（廣播）兩個詞，形成了一種新的媒體形式。
While-Listening
Famous trees in China
Trees and people
Trees help each other
Listen to the podcast The Natural World and tick( ) the main topic of it.

Listen again. Decide whether the following statements are true (T) or false (F).
( ) Trees use their branches to communicate with each other.
( ) Trees can ask each other for help when bad things happen to them.
( ) Older trees and younger trees help each other.
( ) Healthy trees help sick trees.
( ) Most trees share things with trees from different species.
( ) It is harmful when the branches and leaves of trees join together.
F
T
T
T
F
F
roots
same
good
Amazing Trees
Good evening. Thanks for joining me in this week’s The Natural World. I’m Rebecca. For the next four weeks we’ll talk about trees around us. And today’s topic is about how trees help each other. Being a tree can be difficult, but trees have found ways to make it easier for one another. In fact, trees are not alone. They have very long roots, and they use them to communicate with their neighbours. When something bad happens to a tree, it may be able to send a message through its roots. Then the other trees will try to help it. Did you know that, like us, trees also have families
Tapesript
Older trees give younger trees food and water. Younger trees also help older trees survive. When one tree becomes ill, the healthy trees around it will try to help. Most trees only share things with trees from the same species. However, some trees always help their neighbours, even if they aren’t their relatives. Trees know they are stronger together. When their branches and leaves join together, they don’t need to worry about strong winds. Together they grow better and stronger. Aren’t trees amazing That’s all for today. Next week I’ll talk about famous trees in China. What are they Think of your favourite and join me next Tuesday to find out more. See you then!
What other amazong facts do you know about trees Share your fact with your classmates.
Discuss the questions below.
沙箱樹
這種樹可以長到30米高，樹干上長滿致密的刺，樹皮、種子和樹葉中儲存著毒藥。更神奇的是，當沙箱樹扔下種子時，會像子彈一樣將它們從樹干發射出來，時速可達240公里，這對人們構成了危險。
榕樹
榕樹具有獨木成林的能力。其軀干上往往生有許多隨風飄蕩的氣根，這些氣根一旦接觸地面，便可扎入土壤中，逐漸變成樹的新干，與主干共同支撐起樹冠，形成大片的樹蔭。
年輪
年輪是樹木樹干橫截面上的同心圓環，每一圈代表一個生長周期。年輪的寬窄會因季節、氣候、土壤條件以及樹木自身的生長狀況而有所變化。一般來說，春夏季節樹木生長旺盛，年輪部分較為柔軟且寬厚，顏色較淺；而秋冬季節樹木生長較慢，年輪部分則較為狹窄，顏色較深。
Thank you!

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