【题目】读经纬网示意图.完成下列内容。
(1)写出A、D两点的经纬度。
A(_________,__________);
D(_________,_________ )。
(2)判断B、C两点的半球位置。
从南、北半球看,B点位于_________半球;
从南、北半球看,C点位于_________半球。
(3)A点在C点的___________方向。
【答案】
(1)A(40°W,40°N) B(0°,20°E)
(2)北,南
(3)正北
【解析】
试题分析:
(1)在经纬网上,经线的度数叫做经度,若相邻两条经线的经度向东增大,就是东经,用符号E表示,若相邻两条经线的经度向西增大,就是西经,用符号W表示;纬线的度数叫纬度,若相邻两条纬线的纬度向北增大,就是北纬,用符号N表示,若相邻两条纬线的纬度向南增大,就是南纬,用符号S表示。据图可知:A点的坐标是(40°W,40°N); D点的坐标是(0°,20°E)。
(2)我们以赤道为界将地球划分为南北半球,赤道以北为北半球,以南为南半球;以20°W和160°E组成的经线圈为界将地球划分为东西半球,20°W以东、160°E以西为东半球,20°W以西、160°E以东为西半球。据图可知:从南、北半球看,B点位于北半球,C点位于南半球。
(3)地图上定向的方法很多,对于一般地图,通常是面对地图“上北下南,左西右东”;有指向标的地图,根据指向标定向,一般来说,指向标箭头指向北方;有经纬网的地图,根据“经线指示南北方向,纬线指示东西方向”来确定方向。据图可知:A点在C点的正北方向。
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