資源簡介

(共22張PPT)
Unit 4 Our animal friends
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 are animals important to us
tell stories about how animals help human beings.
explain why animals are important to us.
understand the relationship between humans and animals.
describe how wild animals became our friends and helpers.
Unit objectives 單元目標
I can:
Lead-in
Do you know some interesting biological science
生物發光：部分生物具備獨特的發光能力。比如螢火蟲，能在夜間閃爍美麗光芒，這源于其體內熒光素在熒光素酶作用下與氧氣發生反應產生光；深海中一些生物，像燈籠魚、發光水母等，也能發出藍色等顏色的光，用于吸引獵物、求偶或自我保護等 。
擬態：指一種生物在形態、行為等特征上模擬另一種生物或非生物的現象。例如，枯葉蝶的翅膀形狀和顏色酷似枯葉，在遇到危險時能偽裝成枯葉躲避天敵；竹節蟲身體細長，形態如同竹節，隱藏在樹枝間不易被發現。
共生：不同物種之間形成的緊密互利關系。以地衣為例，它是藻類和真菌的共生體，藻類通過光合作用為真菌提供有機物，真菌則為藻類提供水分、無機鹽以及保護，使它們能在惡劣環境中生存；還有根瘤菌與豆科植物的共生，根瘤菌能固氮，為植物提供氮素營養，植物為根瘤菌提供生存場所和能量。
變態發育：一些動物在生長發育過程中，形態結構和生活習性會發生顯著變化。如青蛙，幼體（蝌蚪）生活在水中，用鰓呼吸，有尾；成體大多生活在陸地上，也可在水中游泳，用肺呼吸，無尾；蝴蝶的發育要經歷卵、幼蟲（毛毛蟲）、蛹和成蟲四個階段，各階段形態和生活方式差異很大。
Bees are very different from other animals: they live together in huge groups called colonies (群體). Let’s find out more about the life of bees!
Read the text about the life cycle of bees.
Read the life cycle of bees and answer the question.
Task 1
How many types of bees are mentioned in the article What are they
Three. They are queen bee, drone and worker bee.
drone //dr n/ n. 雄蜂
Read and complete the table.
Task 2
This is a queen bee. She is the biggest bee. There is only one queen in a colony. She lays the eggs.
Queen bees
What do they do
(1)______________
They lay the eggs.
Drones
What do they do
(3)_______________________
This is a drone. Drones are male bees. Their main job is to mate (交配) with the queen.
Their main job is to mate with the queen.
Worker bees
What do they do
(5)_______________________
This is a worker bee. Worker bees are female. They build the colony and they clean it too. They look after the young bees. They make honey with the things they collect from flowers.
They build the colony and clean it too. They look after the young bees. They make honey.
Read and complete the table.
Task 3
Queen bees
Development time: (2)_____________
Drones
Development time: (4)_____________
Worker bees
Development time: (6)_____________
about 16 days
about 21 days
about 24 days
Do you know any other interesting facts about bees Discuss in groups.
Unique communication methods:
Bees can communicate through dancing. For example, when a honey-bee searches for and inspects a new nest site, it advertises and debates the merits of the new site with a waggle dance. The better the site, the longer and harder the bee dances.
The exquisite structure of the beehive (蜂巢):
Bees build beehives with wax (蜂蠟). The whole beehive is like a hexagonal cone, consisting of many hexagonal honeycombs. This structure can obtain the largest space and the strongest stability with the least amount of material. Bees carry out various activities such as reproduction and food storage in the beehive.
Project
Making a presentation on our animal friends
Step 1 Think about different animals around us (e.g. pets, farm animals) and choose one for your presentation. Then brainstorm ideas in groups.
Use the questions below to help you.
What can this animal do for us
Are there any interesting stories about the animal (e.g. stories from the people around you, news reports, famous legends)
What can we do for this animal
...
Step 2 Plan your presentation and make slides.
Remember to:
keep the content simple and easy to understand
find suitable images for each slide
use clear and correct language
For example
Step 3 Give your presentation to the class.
智慧角
一個人若未曾愛過一種動物，他的靈魂有一部分是未曾覺醒的。
——阿納托爾 法郎士（法國作家）
Wits corner
Until one has loved an animal, a part of one’s soul remains unawakened.
— Anatole France
Thank you!

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