Unit 4 opic 2 I'm excited about the things that will be discovered in the future. Section C 课件(共25张

(共25张PPT)
Unit 4 Amazing Science
Topic 2 I’m excited about the things that will be discovered in the future.
Section C
Do you want to be
a film star
an astronaut
a boss
a popular girl or boy
Answer my questions loudly!!
Lead-in
Learning Aims
1.Know more about Mars and motivate the
students’ interest in exploring the space.
2.We should learn key words and sentences :
diameter, storm, be named after sb.,
go around ,at a distance of ,search for …
倍数+as…as…etc
3.Improve the students’ reading skills.
Pre-reading
1.Predict which sentences are true about Mars
____1). Mars looks like a red ball.
____2).The temperature on Mars is very high.
____3). Mars is much larger than the earth.
____4). Mars is too far away for us to reach.
2.Listen to the Mp3 and check them.
T
F
F
T
predict
While-reading
Read the text and finish the following tasks .
Task1.Skim the text to grasp its main idea
Task2. Scan the text and complete the mind-map of this text or do 1b.
Task3. Explain some important language points and sentences.
1.Can you give the passage a title
3. What’s the main idea of this passage
Mars
2.What’s the article type of the passage
Expository writing(说明文）
It tells us about Mars, including its name, diameter, distance, shape, climate, gravity, temperature and air etc.
Task1.Skim the text to grasp its main idea
Task2 Scan the text and complete the mind map.
name
color
shape
diameter
climate
gravity
temperature
distance








air

Four students a group to work
What can you learn about Mars
name
color
shape
diameter
climate
gravity
temperature
distance
Mars
Red and orange
ball
Between minus 138 degrees celsius and 28 degrees celsius
air
0.13% oxygen
solar system
太阳系
['s l (r)]
Mars
The fourth planet from the sun
Mars is the fourth planet from the sun in our solar system and is named after Mars, the Roman god of war.
Why is it called Mars
the Roman god of war
被命名
罗马战神
It is much smaller than the earth. Its diameter is 53% as wide as that of the earth.
[dai' mit ]
gravity
The gravity on its surface is about 40% as strong as it is on earth.
n. 引力，重力
/'gr v ti/
It takes a spaceship about eight months to reach Mars from the earth when the two planets are closest to each other.
地球到火星的最近距离约为5500万公里，最远距离则超过4亿公里。
55 million kms
Find out the key phrases and sentences.
1.be named after/ be named by
.
2.go around
3.at a distance of 有…距离
4.be covered by/with
Task3
at a distance 在远方
万达广场以公司“万达”为名。/万达广场是由万达集团命名的。
月球在相隔地球38万千米的地方绕地球转。
The moon goes around the earth at a distance of about 380 thousand kilometers.
Wanda Plaza was named by Wanda company.
Wanda Plaza was named after Wanda.
1. Its diameter is 53% as wide as that of the
earth.
2. The gravity on the surface of Mars is about
two-fifths as strong as it is on earth.
归纳
Important and difficult points
Its diameter is 53% wider than that of the earth.
1)A+be+倍数+as+adj./adv.原级+as+B
2)A+be+倍数+adj./adv.比较级+than+B
拓展
The gravity on the surface of Mars is two-fifths stronger than that on the earth.
Work in groups and try to retell the text.
Mars
diameter
go around
shape
weather
gravity
temperature
take a spaceship
fourth, be named after
53% as wide as
at a distance of
between minus 138 degrees celsius and 28 degrees celsius
air
0.13% oxygen
ball
be covered by
two-fifths
eight months
Post-reading Exercise1
Mars, the _______ （第四）planet of the solar system, goes around the sun at a _________ ['dist ns]of about 228 million kilometers. Its _______ [dai' mit (r)]is 53% as wide as that of the earth. It looks like a _____ and _______ball. It’s very beautiful. But during ______ and _______, strong __________(风暴）can cover the whole__________of Mars. The gravity on the surface of it is about ________ as________as it is on earth. The air has only_____ oxygen. It takes a spaceship _________ to reach Mars when they are closest to each other.
fourth
distance
red
orange
spring
summer
storms
surface
two-fifths
strong
diameter
Individual work.
0.13%
eight months
Post-reading Exercise2
Exercise3 用适当 的词填空。
1.Tom is very strong, he ________(weigh) 80 kilos.
2.The weather report says that there will be a strong s________ this afternoon.
3.It _____ (花费）me three hours to finish the work.
4.The Hope Primary school is named ____ PingAn.
5.With the help of t_______, we can see the stars that are far away from the earth in the space.
weighs
torm
took
after
elescope
concluding
1. We know more about Mars in his lesson. I hope you will have interest in space science especially in exploring Mars. Some day some of you can land on Mars.
2. We can use mind map to learn or go over our lesson, It will give you clear mind.
Summary
Words and phrases:
solar system
Roman
God of war
be named after
diameter
gravity Grammar:
倍数+as+adj./adv.+as
百分数
Sentences:
Its diameter is 53% as wide as that of the earth.
It takes/took+sb.+一段时间+to do sth.
Thanks for your coming !
Good bye!
Exercise3 Discuss
Try to use the knowledge you learned to discuss the crazy questions with your partner and state your reasons.
1.Does Mars have a good climate for planets
2.Is Mars a useful place to dry fruit
3. Is Mars a good place for human being to live
4. Is Mars a comfortable place for heavy people
Four Ss a group