Unit 4 Amazing Science Topic 2 Section C 学案（含答案）仁爱版九年级上册

Unit 4 Topic 2 Section C
【学习目标】
1.能理解Mars这篇文章的内容,并构建知识导图。
2.能根据文章内容做阅读理解题。
3.能根据提示写一篇80词左右的书面表达。
【预习导学】
一、生词速查
1.　　 n.风暴,暴(风)雨
2.　　 v.重,有……重
3.　　 n.旅行
二、短语速记
1.太阳系　 　
2.遥远的 　 　
3.以……命名 　 　
4.相距;有……的距离　 　
5.被……覆盖　 　
三、句子速译
1.在我们的太阳系中,火星是离太阳第四近的行星,而且是以罗马战神Mars的名字命名的。
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2.它的直径是地球的百分之五十三。
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3.火星围绕着相距约两亿两千八百万公里远的太阳运转。
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四、想一想
1.Do you know what eight planets are in our solar system (May answer in Chinese)
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2.Which planet is closest to the sun (May answer in Chinese)
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【答案】
一、
1.storm
2.weigh
3.journey
二、
1.solar system
2.far away
3.be named after
4.at a distance of
5.be covered by
三、
1.Mars is the fourth planet from the sun in our solar system and is named after Mars, the Roman god of war.
2.Its diameter is 53% as wide as that of the earth.
3.Mars goes around the sun at a distance of about 228 million kilometers.
4.但是在春夏季节,火星表面覆盖着很强的风暴。
5.火星表面的重力约是地球上重力的五分之二。
四、
1.水星、金星、地球、火星、木星、土星、天王星、海王星。
2.水星(Mercury)。
【合作探究】
任务驱动一 构建思维导图
阅读1a,完成思维导图。
　　◎学法指导:抓住核心、辐射周边、理顺主题、寻找支撑,很快就会脉络清楚,主次分明。
任务驱动二 阅读理解任务
　　◎学法指导:1.认真阅读题目,找出关键词。2.细看选项,谨防偷梁换柱。3.每一句推理都有文章依据,做到有理有据。
阅读1a,选择正确答案。
()1.Which planet is the fourth one from the sun
A.The earth.　　　B.The moon.
C.Mars. D.Jupiter.
()2.How far is Mars from the sun
A.About 228 kilometers.
B.About 228 million kilometers.
C.About 228 million meters.
D.About 228 billion kilometers.
()3.If a person is 70 kilos on earth, how heavy will he be on Mars
A.280 kilos. B.70 kilos.
C.28 kilos. D.14 kilos.
任务驱动三 写作任务
　　◎学法指导:1.开头:抓住回信的基本格式,表达收到来信的心情,表示感谢,然后表达想多了解一些新信息。2.主体:有步骤地提出疑问。3.结尾:祝福与期望。
假如你是康康,请根据文中2的内容给Uncle Stephen回复一封电子邮件,向他咨询火星上的相关信息,80词左右。
提示:1.What kind of clothes does he wear
2.What's the weather like there
3.What food and drinks does he eat and drink
4.How does he travel
Dear Uncle Stephen,
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【答案】
任务驱动一
任务驱动二
1~3　CBC
任务驱动三
Dear Uncle Stephen,
I'm so excited to hear from you.Thanks for telling me some interesting things about the Mars.I feel very anxious to know more information about the life on Mars now.Would you please tell me more about it
First of all, I'd like to know what kind of clothing you are wearing.Do you have to wear spacesuits Then how about the weather there Is it really cold at night Besides, what do you usually eat for your meals What else do you drink besides water All these questions are full of my mind.Last but not least, how do you go to other places By spaceship or on foot
Good luck to you and I hope you will tell me all the questions above after you come back on earth.
Yours,
Kangkang
【知识超市】
[命题点一]be named after的用法 　
●Mars is the fourth planet from the sun in our solar system and is named after Mars, the Roman god of war.火星是我们的太阳系中距太阳第四近的行星,它是根据罗马战神Mars的名字命名的。
◎观察思考:1.He is named after his mother's family name.他是根据他母亲的姓氏命名的。
2.The dog is named after a funny movie.那条狗是根据一部有趣的电影命名的。
3.I named my cat Sophie after a true name of a girl.我给我的小猫取名Sophie是按照一个真实的女孩名字而取的。
◎用法总结:1.be named after 根据……命名
2.name sb.... after...按照……给某人取名
对点自测
根据汉语提示或所给单词的适当形式填空
1.Who is the baby 　　(name) after
2.Is the machine named 　　(命名) its inventor
3.We 　　(给……取名) the dog Ah Huang after its owner's family name.
【答案】
1.named
2.after
3.named
[命题点二]分数以及as...as的用法 　
●The gravity on the surface of Mars is about two-fifths as strong as it is on earth.火星表面的重力约是地球上的五分之二。
◎观察思考:1.Three fourths of the surface of the earth is covered with water.地球表面的四分之三覆盖着水。
2.The ruler is twice as long as that one.这把尺子是那把的2倍长。
3.I am not as strong as Jim.我没有Jim身体强壮。
◎用法总结:1.分数的表示:分子基数词,分母序数词,分子大于1,分母加s。2.as+adj./adv.+as与……一样……; not as/so+adj./adv.+as 不如……,这是同级比较的用法。
对点自测
选词填空
1.I don't think this road is as 　　(wide/widely) as that one.
2.Two 　　(third/thirds) of the students in our school are girls.
3.One 　　(five/fifth) of the food has been eaten up by the birds.
【答案】
1.wide
2.thirds
3.fifth
2