题目内容

【题目】地理观测实践题。

学习地理,不仅仅要从书本中获取知识,也要培养观察能力,掌握观测方法,学会从自然中获取鲜活知识。请同学们设计完成下面观测报告相关内容。

观测主题:观测本地物体日影长度的日变化规律

(1)观测工具:______________________________

(2)观测时间及次数:____________________

(3)观测内容:_________________________________

(4)观测结果:_________________________________

(5)某中学地理兴趣小组观测发现,天津(39°13'N,117°20'E)在正午阳光照射下,树影始终朝向偏___(北或南),原因是________

【答案】直尺、木杆等 早、午、傍晚三次 杆影长度 一天中正午日影最短,早晚最长 太阳直射点始终在天津南面(

【解析】

太阳直射点在南北回归线之间来回移动,导致地球上南北半球季节相反;一天中,从太阳升起到太阳落山,地球上的正午太阳高度会发生变化,正午时的太阳高度角最大。

(1)由题目可知,此次观测本地物体影长度的日变化规律,要用直尺、木杆等工具。

(2)观测的时间是早上、正午及傍晚共三次,这三个时间段最有代表性。

(3)观测的内容是木杆的影子长度。

(4)观测和是一天吕,正午的影子最短,早上的傍晚影子最长。

(5)天津(39°13'N,117°20'E)在正午阳光照射下,树影始终朝向偏北,因为天津位于北温带,太阳直射点始终位于天津的南面。

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相关题目

【题目】 Paul is a 12- year - old boy from Australia. He has short blond hair, blue eyes and a big nose. He comes to China to study with his parents. He likes to be friends with others. He can speak Chinese well. And everyone in his class likes him, so he is always the center of attention (关注). His best friend is Lucy. Lucy is from Canada. She says Paul is handsome and nice. Jessica is a beautiful girl. She is thirteen years old and she is from the USA. She is tall with big blue eyes. For her, basketball is really interesting. She dreams of being a basketball player of national team(国家队). But her parents want her to be an actress because she has good looks.

Scott is a Chinese boy. He is 13 years old. He has short black hair and black eyes. He is short. He lives with his grandparents in a village because his parents are working in Beijing. He can only see his parents once(一次)a year. He doesn’t like that. He misses his parents very much. To see his parents often, he spends much time studying and he wants to walk out of his village. He is a great boy!

1Where does Paul’s best friend come from?

A.Australia.B.America.C.Canada.D.China.

2Paul and Scott have ________ .

A.brown hairB.blue eyesC.short hairD.big eyes

3What is Jessica interested in?

A.Acting.B.Playing basketball.C.Dancing.D.Making friends.

4We can see that _______ and ________ are of the same age.

A.Paul; JessicaB.Jessica; ScottC.Paul; ScottD.Paul, Jessica; Scott

5Which of the following is NOT true?

A.Lucy thinks Paul is handsome.B.These four students are from different countries.

C.Scott wants to see his parents.D.Jessica’s parents want her to be a basketball player.

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