【题目】读地球绕太阳公转示意图(如图1),回答下列问题.
(1)地球公转的方向 , 周期 .
(2)地球公转位置在B点时,太阳直射在(23.5°N,23.5°S),
北半球的季节是 .
(3)地球上南北半球的季节 .
(4)图2为荆门市某学校的王玲同学在不同时间里她的身影长短变化情况示意图.假如王玲的身高不变,请比较判断:如果是在同一天,则更接近正午的是图(填甲或乙);如果是在不同季节的正午时刻,则更接近冬至日的是图(填甲或乙).
【答案】
(1)自西向东;一年
(2)23.5°N;夏季
(3)相反
(4)乙;甲
【解析】读图可知,(1)地球绕太阳不停的旋转叫地球的公转,地球公转的方向自西向东的,周期是一年.(2)地球公转位置在B点时,为北半球的夏至日,日期为6月22日前后,太阳直射在北回归线上,即23.5°N纬线上,此时北半球为夏季.(3)地球上南北半球的季节是相反的,当北半球为夏季时,南半球为冬季.(4)由于地球自转,在同一天,正午的太阳高度角最大,影子应最短,从图中看出乙图影子短,应在正午;由于地球公转,在不同季节的正午时刻,冬至日太阳直射了南回归线,北半球太阳高度角最小,影子最长,从图中看出甲图影子长,应更接近冬至日.所以答案是:(1)自西向东;一年;(2)23.5°N;夏季;(3)相反;(4)乙;甲.
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