Topic 2 I’m excited about the things that will be discovered in the future.Section C课件（29张PPT)

课件29张PPT。Unit 4 Amazing Science Topic 2 I’m excited about the things that will be discovered in the future. Section C Would you like to be an astronaut and go to Mars some day?Do you know anything about Mars? solar system 太阳系Mars is the fourth planet from the sun in our solar system. solar system It is named after Mars, the Roman god of war. Marsthe Roman god of war 被命名太阳系罗马战神e.g. Venus is named after Venus, the goddess of love .
n. 风暴，暴(风)雨It is much smaller than the earth. Its diameter is 53% of the earth’s.直径During spring and summer, the strong storms can cover the whole surface of Mars. The gravity on its surface is about 40% as strong as it is on earth. 引力，重力1a Read and understand. Look at the pictures and predict which statements 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.TFFFpredictRead and listen to 1a and answer the questions. (1) What does Mars look like?
It looks like a red and orange ball.
(2) How far is Mars from the sun?
It’s about 228 million kilometers away from the sun.
(3) What’s the temperature on Mars?
It is between -138℃and 28℃.1b Read 1a again and write down the information about Mars. 53% as wide as that of the earth red and orangea 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 1. Its diameter is 53% as wide as that of the
earth.它的直径是地球直径的53%。
2. The gravity on the surface of Mars is about
two-fifths as strong as it is on earth.火星表面的引力大约是地球引力的五分之二。
倍数(分数)+ as +adj.+as ……的几倍
Language Points The green book is twice as thick as his the red one.The red book is 50% as thick as the green one.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+距离 …有 ……距离 , 相隔
at a distance 在远处
e.g.月球在距地球38万千米的地方绕地球旋转。
The moon goes around the earth at a distance of 380 000 km.
警察远远地跟着他。
The police followed him at a distance.

Language Points 4. tell “辨别，区别，认出”，常和can, could, be able to连用。
e.g.天太暗了，我没有认出是你。
It was so dark that I couldn’t tell it was you.
It was too dark to tell it was you.be covered by被覆盖。被动语态，强调动作发出者
be covered with遮盖，遮蔽。系表结构，强调状态

e.g.土地被雪覆盖。
The ground is covered with snow.
The ground is covered by snow.
V.-edadj.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. fourthdistanceredorangespringsummerstormssurfacetwo-fifthsstrongdiameterFill in the blanks.Retell 1a Mars, fourth, be named after
diameter, as wide as, at a distance of, tell, because, bright red, ball, storms, gravity, temperature, oxygen
eight months, closest to, searching for1c Discuss the crazy questions with your partner and state your reasons. 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? Why do people want to search for more information about Mars?Why do people want to live on Mars?Can we normal people live on Mars some day in the future? How about at present?Protect the enviroment.We have only one earth.Read 2 and answer the questions.(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. 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. ______________(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 StephensincetookgetquiteWhat’s worsethoseWhat2 Kangkang’s uncle sent an e-mail to him from Mars. Choose the right words to complete the letter. 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. 3b Work in pairs. Check your partner’s e-mail and use your knowledge of Mars to answer the questions for Uncle Stephen. 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 am looking forward to your e-mail!
Good luck!
Yours,
Kangkang You can write it like this :SummaryWe learn: 1. Some words: storm, weigh, journey
2. Some phrases: name after, as …as,
at a distance of, search for
3. Some sentences:
(1) Its diameter is 53% as wide as that
of the earth.
(2) It has been two days since we
landed on Mars.
We can : 1. Talk about something more
about Mars.
2. Write back an e-mail.Read 1a.
Memorize the useful expressions and key sentences which we learned today.
Finish Section C in your workbook.
Review Sections A-C.AssignmentThank you