资源简介

(共46张PPT，内嵌视频)
外研版 七年级上Unit 5The power of plantsUnderstanding ideasreading
Warming-up
What can you know about the plants from the video
The plants also have lives(生命).
单词讲解
within [w n] prep.在(建筑或地区)里
常用搭配：
within reach (在伸手可及的范围内)
within reason (在合理范围内)
例句：Please stay within the boundaries of the park. (请呆在公园的范围内。)
拓展：without prep. 没有；缺乏
单词讲解
quarter [ kw t (r)] n.一刻钟，十五分钟
复数形式：quarters
常用搭配：
quarter past one(一点一刻)
quarter to one (差一刻一点)
例句：I’ll meet you at a quarter past three.
(我会在三点过一刻见你。)
单词讲解
workshop [ w k p] n.车间，工场
复数形式：workshops
常用搭配：
art workshop (艺术工场)
writing workshop (写作工坊)
例句：He attended a photography workshop.
(他参加了一个摄影工作坊。)
单词讲解
leaf /li f/ n. 叶，叶子
例句：
1. She picked up a leaf from the ground.
她从地上捡起一片叶子。
2. The plant has green leaves.
这种植物有绿色的叶子。
leaf --leaves (复数)
注：以f 或者fe 结尾的名词，把f 或fe 变 v+es
单词讲解
collect /k 'lekt/ v. 收集，采集；使集中
例句：I used to collect stamps.
我过去曾经集邮。
拓展：
collection n. 收藏品
单词讲解
root [ru t] n.根
复数形式：roots
常用搭配：
root cause (根本原因)root system (根系)
take root (扎根)
例句：The tree’s roots are very deep.
(这棵树的根很深。)
单词讲解
send [send] v.送出，发出
三单形式：sends 过去式：sent 现在分词：sending
常用搭配：
send an email (发送电子邮件)
sent sth. to sb.=send sb. sth. （给某人发送某物）
send sb. to do sth. 派某人去做某事。
例句：Please send me the details by email.
(请通过电子邮件把详情发给我。)
单词讲解
rise [ra z] v.升高.上升
三单形式：rises 过去式：rose 现在分词：rising
相关词汇：sunrise n. 日出
raise v. 提起；举起；升旗(及物动词)
rise up to... 上升到......。
例句：The sun rises in the east. (太阳从东方升起。)
单词讲解
stem [stem] n.茎，梗，柄
复数形式：stems
常用搭配：
flower stem (花茎)
stem from (起源于)
例句：The rose has a thorny stem.
(玫瑰有刺茎。)
单词讲解
mix [m ks] v.混合，拌和
拓展：mixture n.混合物
常用搭配：
mix...with... 把...和...混合
mix up 混淆；弄混
mix sb. sth.=mix sth. for sb. 为某人搅拌某物。
例句：You should mix the flour and water thoroughly. (你应该把面粉和水彻底混合。)
单词讲解
produce [pr dju s ] v.生产，产生，出产
三单形式：produces
常用搭配：
produce goods (生产商品) produce results (产生结果)
例句：The factory produces thousands of cars each year. (这家工厂每年生产数千辆汽车。)
拓展： produce v. 生育
product n. 产品 producer n.制造商，生产商
单词讲解
sugar [ ɡ (r)] n.糖
不可数名词
例句：
Too much sugar is bad for your health.
(摄入过多的糖对健康不利。)拓展：
sugar cane 甘蔗
blood sugar 血糖
单词讲解
product [ pr d kt] cn.生成物
常用搭配：
chemical product (化学产品) final product (最终产品)
例句：This company makes a variety of beauty products. (这家公司生产各种美容产品。)
拓展：
product n. 产品：
动词：produce v. 生产
单词讲解
oxygen [ ks d n] n.氧
不可数名词
常用搭配：
oxygen tank (氧气罐)
oxygen level (氧气水平)
例句：We need oxygen to survive. (我们需要氧气来生存。)
单词讲解
though [ ] conj.虽然，尽管
常用搭配：
even though (即使) as though (仿佛) although (虽然)
例句：Though it was raining, we went for a walk.
(虽然在下雨，我们还是去散步了。)
拓展：
though 虽然，同义词：although 引导让那个不状语从句(不与but连用)
单词讲解
breathe [bri: ] v.呼吸
常用搭配：
breathe deeply (深呼吸) breathe air (呼吸空气)
例句：Humans need to breathe oxygen to live.
(人类需要呼吸氧气才能生存。)
拓展：
相关短语：breathe in 吸入 breathe out 呼出
名词：breath /breθ/ n. 呼吸
相关短语：take a deep breath 深呼吸 out of breath 喘不过气来
单词讲解
dark [dɑ k] adj.昏暗的;黑暗的
副词形式：darkly
常用搭配：
dark blue 深蓝
in the dark 在黑暗中
before dark 黄昏以前
例句：The room was so dark that I couldn't see anything. (房间太暗了，我什么都看不见。)
单词讲解
rest [rest] n.休息(时间)
常用搭配：
take/have a rest (休息一会儿)
get some rest (休息一下)
例句：After a long day of work, I need to take a rest. (工作了一整天后，我需要休息一下。)
拓展：rest v. 休息
单词讲解
natural [ n t r l] adj.自然的
常用搭配：
natural environment 自然环境
natural science自然科学
例句：The waterfall is a natural wonder.
(瀑布是一个自然奇观。)
拓展: nature n.自然 副词形式：naturally
sugar
leaf
sunlight
water
sunlight
sugar
water
leaf
1.Look at the picture of a plant and match the words to it.
/ kɑ:b n da ksa d/
Know more about it
光合作用
1. Choose another suitable title and give your reasons.
A. How to make sugar.
B. How plants work.
C. Why plants are great.
D. Going to the green workshop.
2. What type of writing is this passage
A. Narration (记叙文).
B. Argumentation (议论文).
C. Practical Writing (应用文).
D. Exposition (说明文).
Scan the passage and answer the two questions.


Read the passage and match the main idea with each paragraph.
Para. 1
Para. 2
Para. 3
Para. 4
Para. 5
Plants produce products.
How plants work.
Introduce the Worker No. 55.
The importance of plants.
Workers in plants will have a rest.
What is the structure of this passage
A
B
C
①
②
③
④
⑤
①
②
③
④
⑤
①
②
③
④
⑤
Read para. 1 and answer the questions.
1 It's quarter past seven. Here's Worker No.55 in his green uniform. He's going to start work in the plant.
1.What time is it
It’s quarter past seven. (7:15)
2. What is he going to do
He is going to start work in the plant.
2 He works in Workshop 1001 in the Leaf.There are 20 to 100 workers in each workshop. They collect sun light and CO during the day. Now workers from the Root send up water. The water will rise up to the Leaf through the Stem. Then workers in the Leaf will mix water, CO and sunlight.
Read para. 2 and answer the questions.
1. In which part of the plant does Worker No. 55 work
2. What two things do the workers in Workshop 1001 collect during the day
3. How does water rise up to the Leaf from the Root
4. What three things do the workers mix in the Leaf
In the Leaf.
They collect sunlight and CO2 during the day.
The water rises up to the Leaf through the Stem.
The workers in the Leaf mix water, CO2 and sunlight.
Read para. 3 and answer the questions.
3 What are they going to produce Most importantly(for them),there will be sugar!It's useful for the growth of the plant.Another product will be oxygen,but the plant doesn't need much of it. It means a lot to animals and humans, though—they need it to breathe!
1. What are the two main products
2. Which product is useful for the growth of the plant
3. Which product is important for animals and humans Why
The two main products are sugar and oxygen.
Sugar.
Oxygen is important for animals and humans because they need it to breathe.
Read para. 4 and answer the questions.
4 The workers work hard. Soon it's going to get dark. They will take a rest.
Further thinking
Why will workers take a rest in dark
Because there isn’t sunlight during the night, so the workers stop working.
Read para. 5 and answer the questions.
5 There are millions of plants on earth. They give more than food and oxygen. Without plants, the natural world would be very different!
How would the natural world be different without plants
Further thinking
Read para. 5 and answer the questions.
5 There are millions of plants on earth. They give more than food and oxygen. Without plants, the natural world would be very different!
How would the natural world be different without plants
Further thinking
1.Climate Change: without plants, the lever of carbon dioxide would rise and lead to global warming.… .
2.Human: There would be less oxygen in the air for us to breathe, and we would have less food and medicines … …
3.Animals: A lot of animals would not have food and might not survive.There would be fewer places for animals to live,and we might lose many species(物种)……
No matter what will happen in the future,now,we should protect plant !
Translate the following expressions into English.
1. 现在是七点一刻。
2. 穿着他的绿色制服
3. 在白天
4. 送上去
5. 上升到
6. 对……有用
7. 对……意义重大
8. 努力工作
9.变暗，变黑
10. 休息一下
11. 数百万
12. 世界上
13. 超过，不仅
14. 自然界
______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
It's quarter past seven.
in his green uniform
during the day
send up
be useful for
rise up to
mean a lot to...
work hard
get dark
take a rest
millions of
on earth
more than
the natural world
Look and learn
Step 1 Leaves of plants collect 1. _______.
Step 2 Plants collect 2. ____ from the air.
Step 3 Plants
3. ________ water from the root.
Animals and humans need it to 5. .
Useful for the growth of plant.
4. _____
O2
Fill and retell
sunlight
CO2
send up
sugar
breathe
3.Choose another suitable title and give your reasons.
a How to make sugar
b How plants work
c Why plants are great
d Going to the green workshop
Think and share
What does “plant” mean in the title
The word “plant” has two meanings. One is about the living thing. The other is about the place the workers work in.
Learning to think:
A pun (双关语) is a word with more than one meaning. It’s a clever way to make the passage
more interesting.
In what other ways do plants help the world
For people: provide food, clean the air and help stop the floods...
For climate: reduce the effect of climate change...
For animals: provide food and homes for animals...
Think and share
4.Complete the texts with the words and expressions from the passage.
3. ___________, CO2 and sunlight will turn into __________ and oxygen. Oxygen is important to humans—they need it to __________.
What is a plant like
How do plants work
leaf
stem
root
leaf
Water
sugar
breathe
2. Water from the root will ________ to the leaf through the stem.
1. Sunlight and CO2 come into the ___________.
rise up
Language points
1. It means a lot to animals and humans, though—they need it to breathe！不过，它对动物和人类来说意义重大——他们需要它来呼吸！
句中though作副词，意为“可是，不过，然而”。用于为前面的句子增加对比或转折性的信息，常常被用在句子末尾。例如： I didn’t get the job. I learnt a lot, though.
though作连词，意为“虽然；尽管”。用在从句的句首，引导让步状语从句。
e.g. Though it’s raining, they are still working outside.
e.g. The movie is good, though the ending is a little sad.
breathe v. 呼吸—breath n. 呼吸
hold a breath 屏住呼吸 take a deep breath 深呼吸
2. They will take a rest. 他们将要休息了。
take a rest=have a rest 意为“休息”。例如：
I’m going upstairs to take a rest.
will do sth.表示将来要发生的事情
will visit his friend 将要看望朋友
will take a rest 将要休息
3. There are millions of plants on earth. 地球上有很多种植物。
millions of 意为“数百万；大量；许多”，后面跟名词复数。
e.g. There are millions of stars in the night sky.
夜空中有数百万颗星星。
类似的还有：thousands of, hundreds of ,thousands of, a (large) number of
4. Without plants, the natural world would be very different！
没有了植物，自然界不会是现在的样子。
without prep. 意为“没有；不（做某事）；缺乏”，后接名词或动名词作
介词宾语。
e.g. There is no smoke without fire. 无风不起浪。
e.g. I don’t like to go to a country without knowing something of the language.
without plants是一个假设的条件，主句谓语would/could/should/might+
动词原形表示对假设结果的推断，这是虚拟语气的一种。
e.g. Without your help, I would be lost. 没有你的帮助，我会迷路的。
Exercise
Worker No.55 works in the Workshop 1001 in the Leaf of a plant. He usually _________ work in the morning when the sun ________. He works with another 20 to 100 workers in the workshop. They _________ sunlight and CO2 during the day. The workers from the Root _________ _________ water. The water will _________ _________ to the Leaf through the Stem. Then, workers in the Leaf will _________ sunlight, CO2 and water. They are going to _________ sugar and oxygen. Sugar is useful for the growth of the plant and oxygen is important for animals and humans. Without oxygen, we couldn’t live. The workers _________ working when it’s getting dark. That’s the process of photosynthesis（光合作用）.
collect, finish, mix, produce, rise, rise up, send up, start
starts
rises
collect
send
up
rise
up
mix
produce
finish
Fill in the blanks with new words and expressions.
Required
Optional
Homework
Familiarize yourself with the new words and phrases in this lesson.
Use the words and expressions learned in this lesson to retell the process of photosynthesis in plants.
Thank you!

展开更多......

收起↑