Unit 4 Topic 2 I’m excited about the things that will be discovered in the future. Section C课件(共26张P

(共26张PPT)
Unit 4 Topic 2
I’m excited about the things that will be discovered in the future.
Section C
学习目标
能掌握含有分数，百分数等的同级比较
02
能熟悉并正确运用本课时的重点单词和短语
01
能了解火星的相关知识
03
What do you know about Mars
Mars is the fourth planet from the sun in our solar system and is named after Mars, the Roman god of war.
the Roman god of war
罗马战神
solar system
太阳系
Mars
be named after 以…而命名
新课讲授
The solar system
Mars goes around the sun at a distance of about 228 million kilometers.
↑
228,000,000 km
......相隔......
It is much smaller than the earth. Its diameter is 53% of the earth’s.
12742km
6790km
diameter
直径[ da ′ m t (r) ]
During spring and summer, the strong storms can cover the whole surface of Mars.
The average temperature is -55°C.
n. 风暴，暴(风)雨
negative 55 degrees Celsius[′selsi s ]
The gravity on its surface is about 40% as strong as it is on earth.
[′gr v ti ]引力，重力
200 kilos
How much does he weigh on Mars
He weighs 80 kilos
On Mars.
Look at the pictures and predict which statements are true about Mars. Then listen and check.
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. ( )
T
F
F
F
Pre-reading
Read and find out the main idea of each paragraph.
A. Describe what Mars looks like
B. Ask what Mars looks like
Para 1 ___________
Para 2 ___________
Para 3 ___________
B
A
C
C. Search for more information about Mars in the future.
搜索
Fast-reading
Read 1a again and write down the information about Mars.
Diameter Color Shape
Climate Gravity Distance from the sun
53% as wide as that of the earth
red and orange
a ball
during spring and summer: strong storms temperature: between-138℃and 28℃
about two-fifths as strong as it is on earth
about 228 million kilometers
1b
Careful – reading
1. Mars is the fourth planet from the sun in our solar system and
is named after Mars.
name ... after 以……的名字给……取名。
be named after 是被动语态。
e.g. The baby was named after Bruce Lee.
这个婴儿的名字是以李小龙的名字取的。
2 Its diameter is 53% as wide as that of the earth.
它的直径是地球直径的53%。
倍数(分数)+ as +adj+as ……的几倍
Language points
3 Mars goes around the sun at a distance of about 228 million kilometers.
火星在距太阳约228 000 000千米处环绕着太阳转。
at a distance of …有 ……距离
at a distance of相隔，
at a distance在远处。
e.g. The moon goes around the earth at a distance of 380 000 km.
月球在距地球38万千米的地方绕地球旋转。
The police followed him at a distance.
警察远远地跟着他。
in the distance在远处。
e.g. That is Long Island in the distance over there.
那边远处是长岛。
Language points
4. You can tell which planet is Mars because it is bright red in the
night sky.
tell在这里为“辨别，区别，认出”，常和can, could, be able to连用。
e.g. It was so dark that I couldn’t tell it was you.
天太暗了，我没有认出是你。
5. The surface of Mars is covered by strong storms.
be covered被覆盖。
be covered with遮盖，遮蔽
e.g. The ground is covered with show. 土地被雪覆盖。
Language points
6 . Scientists are still searching for more information about Mars.
科学家们正在对火星进行更多的探索。
search for :寻找，搜索
All night they searched for the lost boy.
整个晚上他们都在搜寻那个丢失的男孩。
search… for…寻找，搜索（强调有具体的目标）。如：
She searched many shops for Jim’s gift. 为了送给Jim礼物，她搜索了很多店。
search意为“在……搜查”或“搜身”, 是个及物动词，后面直接跟“被搜查的对象”。如：
Mr.Smith searched every room in the house.
史密斯先生搜索了房子里的每个房间。
Grammar
Fill in the blanks based on 1a.
Mars, the ________ planet of the solar system, goes around the sun at a ________ of about 228 million kilometers. Its ________ is 53% as wide as that of the earth. It looks like a _____ and _______ball. It’s very beautiful. But during ______ and _______, strong ________ can cover the whole ________ of Mars. The gravity on the surface of it is about ________ as ________ as it is on earth.
fourth
distance
diameter
red
orange
spring
storms
surface
two-fifths
strong
summer
Consolidation
Watch the flash of 1a, Then retell the passage.
1. Does Mars have a good climate for plants
2. Is Mars a useful place to dry fruit
3. Is Mars a good place for human beings to live
4. Is Mars a comfortable place for heavy people
Discuss the crazy questions with your partner and state your reasons.
Discussing
Hi Kangkang,
It has been two days_______( since, from) we landed on Mars. It ______(cost, took) us more than two years to______ (reach, get) here. Generally, the journey went well, but the living conditions were _____( quiet, quite) bad during the journey. We had to produce most of the food in the spaceship.
since
took
get
quite
2 Kangkang’s uncle sent an e-mail to him from Mars.
Choose the right words to complete the letter.
____________(What’s more, What’s worse), our water supplies were very low. We had to limit the use of water during ______(those, these) days. So we had a shower every six weeks. We will spend another seven hundred and sixty-three days on Mars. ______( How, What )a long time! I often miss the family, but the excitement of being on Mars is worth it!
Wish me luck!
Yours,
Uncle Stephen
What’s worse
those
What
(1) Who is this e-mail from and to
It is from Uncle Stephen to Kangkang.
(2) How long did it take them to get there
More than two years.
(3) Did everything go well during the journey
No, it didn’t.
Read 2 and answer the questions.
( )1. It’s been five days since they landed on Mars.
( )2. It took them three years to get to Mars.
( )3. They had plenty of food and water in the spaceship.
( )4. They have been away from the earth for 763 days.
( )5. The excitement and risks on Mars are worth it.
F
F
F
T
T
Read again and mark True (T) or False (F).
Dear Uncle,
I am excited to hear that you have landed on Mars. I wonder whether it is true.
____________________________________________________
clothing ; food and drinks ;
weather ; transportation …
3a Write back an e-mail to Uncle Stephen for
Kangkang and ask him for more information
about Mars. The list may help you.
Dear Uncle,
I'm very glad to receive your e-mail, and I know that the living conditions were quite bad during your journey. I am interested in the information about Mars. Can you tell me more about it How about the weather on Mars Is it very cold What kind of transportation do you use there I'm looking forward to your e-mail!
Good luck!
Yours,
Kangkang
3b Work in pairs. Check your partner’s e-mail and use your knowledge of Mars to answer the questions for Uncle Stephen.
课堂总结
We learn:
1. Some words: storm, weigh, journey...
2. Some phrases: be named after, 分数或倍数）as… as ,
at a distance of, search for…
3. Some sentences:
(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.
(3) It takes a spaceship about eight months to reach…
We can :
1. Talk about something more about Mars.
2. Write a passage about Mars.
Read 1a.
Review the useful expressions and key sentences which we learned today.
Finish Section C in your workbook.
Write a small passage “Is Mars a good place for humans to live ”