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1、Unit 4 Amazing ScienceTopic 2Section C学习导航重点研讨课堂小结当堂检测学习目标新知学习新知学习重点研讨课堂小结当堂检测学习目标 Language Goal能熟悉并正确运用本课时的重点单词和短语能熟悉并正确运用本课时的重点单词和短语能掌握含有分数，百分数等的同级比较能掌握含有分数，百分数等的同级比较能了解火星的相关知识能了解火星的相关知识新知学习重点研讨课堂小结当堂检测学习目标Mars is named after Mars,the Roman god of war.the Roman god of war Marsbe named after 以而命名罗马
2、战神新知学习重点研讨课堂小结当堂检测学习目标水星（Mercury）金星（Venus）地球（Earth）火星（Mars）木星（Jupiter）土星（Saturn）天王星（Uranus）海王星（Neptune）solar system sul sistmWhich one is Mars?新知学习重点研讨课堂小结当堂检测学习目标Mars is the fourth planet from the sun in our solar system.Mars新知学习重点研讨课堂小结当堂检测学习目标It is much smaller than the earth.Its diameter is 53%o
3、f the earths.直径 damt(r)新知学习重点研讨课堂小结当堂检测学习目标The gravity on its surface is about 40%as strong as it is on earth.So a person weighs 90 kilos on earth weighs only 36 kilos on Mars.grvti 引力，重力wei v.称重新知学习重点研讨课堂小结当堂检测学习目标1.Mars looks like a red ball.()2.The temperature on Mars is very high.()3.Mars is muc
4、h larger than the earth.()4.Mars is too far away for us to reach.()TFFFPredict which statements are true about Mars.What do you know about Mars?What does it look like?Mars is the fourth planet from the sun in our solar system and is named after Mars,the Roman god of war.Its diameter is 53%as wide as
5、 that of the earth.Mars goes around the sun at a distance of about 228 million kilometers.You can tell which planet is Mars because it is bright red in the night sky.It looks like a red and orange ball.Its very beautiful.But during spring and summer,the surface of Mars is covered by strong storms.新知
6、学习重点研讨课堂小结当堂检测学习目标1a Read and understand.The gravity on the surface of Mars is about two-fifths as strong as it is on earth.So a person who weighs 90 kilos on earth weighs only 36 kilos on Mars.The temperature on Mars is between-138 and 28.The air has only 0.13%oxygen.It takes a spaceship about eigh
7、t months to reach Mars from the earth when the two planets are closest to each other.Scientists are still searching for more information about Mars.新知学习重点研讨课堂小结当堂检测学习目标新知学习重点研讨课堂小结当堂检测学习目标Diameter Color Shape Climate Gravity Distance from the sun 53%as wide as that of the earth red and orangea ball
8、during spring and summer:strong storms temperature:between-138 and 28about two-fifths as strong as it is on earth about 228 million kilometers 1b Read 1a again and write down the information about Mars.新知学习重点研讨课堂小结当堂检测学习目标1.Does Mars have a good climate for plants?2.Is Mars a useful place to dry fru
9、it?3.Is Mars a good place for human beings to live?4.Is Mars a comfortable place for heavy people?1c Discuss the crazy questions with your partner and state your reasons.新知学习重点研讨课堂小结当堂检测学习目标Mars,fourth,be named after,diameter,as wide as,at a distance of,tell,because,bright red,ball,storms,gravity,te
10、mperature,oxygen,eight months,closest to,searching forRetell 1a according to the key words.新知学习重点研讨课堂小结当堂检测学习目标2 Kangkangs uncle sent an e-mail to him from Mars.Choose the right words to complete the letter.Hi Kangkang,It has been two days_(since,from)we landed on Mars.It _(cost,took)us more than tw
11、o 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.sincetookgetquite新知学习重点研讨课堂小结当堂检测学习目标_(Whats more,Whats worse),our water supplies were very low.We had to limit the use of
12、 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 StephenWhats worsethoseWhat()1.Its been five da
13、ys 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.FFFTTRead again and mark True(T)or False(F).新知学习重点研讨课堂小结当堂检测学习目标新知学习重点
14、研讨课堂小结当堂检测学习目标3a Write back an e-mail to Uncle Stephen for Kangkang and ask him for more informationabout Mars.The list may help you.clothing;food and drinks;weather;transportation 新知学习重点研讨课堂小结当堂检测学习目标Dear Uncle,Im very glad to receive your e-mail,and I know that the living conditions were quite bad
15、 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?Im looking forward to your e-mail!Good luck!Yours,Kangkang Language points1.Mars is the fourth planet from the s
16、un in our solar system and is named after Mars.火星是太阳系中离太阳第四远的行星，以火星命名。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。新知学习重点研讨课堂小结当堂检测学习目标2.Its diameter is 53%as wide as that of the earth.它的直径是地球直径的53%。倍数的表示法：倍数+as+形容词或副词原级+as e.g.This box is five times as heavy as that one.这个盒子是那个盒子的四倍重。My house is three times as big as his.我家是他家的三倍大。新知学习重点研讨课堂小结当堂检测学习目标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
