(共21张PPT)
Unit 6 The power of plants
Understanding ideas
Within a
P is for power. They have surprising power.
L
L is for life.
They live in soil, the ocean and even space.
They give out fresh air for us to breathe.
A is for air.
N is for nature. They make the nature a beautiful garden.
T is for tree. They stand so tall, with branches into sky.
S is for sunlight. They need sunlight to grow happily.
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TIPS: Take notes if necessary.
1. Watch video and answer ：What do plants need to grow
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2. What is the name of the process that plants
use to make food
Photosynthesis/f t s nθ s s/
(光合作用)
photo （Greek word希腊语） = light
synthesis（Greek word希腊语）= to put together
Photosynthesis: to put together with the help of light
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3. Let ’s think:
What do you know about photosynthesis
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Let’s go inside the plant.
Look and say
1. What do you see in the picture
2. What is the picture about
3. Do you know the parts of
a plant
Look at the picture of a plant and match the words to it.
sugar
leaf
sunlight
sugar
sunlight water
water
leaf
Scanning
Scan the passage and answer the two questions.
1. Choose another suitable title.
a. How to make sugar.
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)
It gives answers to such questions
as "how", "why" and so on.
C. Practical Writing(应用文)
Exposition (说明文)
Careful reading
Read Para.1 aloud together, then answer the questions.
It's quarter past seven. Here's Worker No. 55 in his green uniform.
He's going to start work in the plant.
1. Can you find Worker No. 55 in the picture
2. What is he going to do
He is going to start work in the plant.
Further thinking
1. Are there any real workers in the plant
No!
2. Why does the writer use "workers" in the passage
Here the writer uses personification (拟人) to make the passage more
vivid and easier for the readers to understand.
Careful reading
Tip: Pay attention to all
the details
Read Para.2 carefully, then fill in the form.
Where does No.55 worker work
How many workers in each workshop
What do they do
Further thinking
chlorophyll (叶绿素)
/kl r f l/
Worker is actually a
Workeshop is actually a chloroplast (叶绿体)
/kl r pla:st/
What does “plant” mean in the title
A: the living thing, like a tree or a flower.
B: the place the workers work in, just like a factory.
A and B
The word “plant” has two meanings.
the living thing
a pun
(双关)
a factory
Careful reading Read para.2—3 careflly for the second time.
Complete the text with the words and expressions from the passage.
leaf
Water
sugar
breathe
rise up
Describe the process of photosynthesis together.
Growth of plant
Step 1 Leaves of plants collect sunlight.
Step 2 Plants collect CO2 from the air.
Step 3 Plants send up water from the r
animals and humans to breathe
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Careful reading
Group work Read para.2-3 carefully again.
Draw a mind-map to show the photosynthesis ,
then choose the best one in the group to share in class.
Careful reading
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.
Light affects(影响) photosyn
Careful reading
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
How would the natural world be different without plants
Further thinking
without plants, the lever of carbon dioxide
would rise and lead to global warming....
There would be less oxygen in the air for us to breathe,
and we would have less food and medicines......
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 !
Now, our class will have a short speech competition, to call
on everyone to protect plants!
Requirements: First discuss in each group and then collect all
the ideas to write a speech , Finally show in class.
aamazing
l
living
natural
t
ppowerful
tough
Design a poster to show the importance of photosynthesis,
using the lesson's key vocabulary and expression
Find all the sentences from the passage with
“be going to” and “will”, then read aloud.
