问题 选择题

关于地球自转的周期和速度的叙述正确的是

A.地球自转360°所需的时间为24小时,这叫做1个太阳日

B.地球自转一周360°称为1个恒星日

C.地球上各地自转的角速度都为每小时15°

D.地球自转的线速度总是纬度高的地方大于纬度低的地方

答案

答案:B

本题考查地球自转的周期和速度。地球自转360°,时间为23时56分4秒,称为恒星日,

昼夜更替周期为24小时,称为太阳日;角速度,除极点为0外,其它各点均为15°/小时,线速度,自赤道向极点逐渐减小为0。所以本题选择B选项。

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