【題目】學(xué)習(xí)地球自轉(zhuǎn)時(shí),同學(xué)們開展了一系列活動(dòng)。讀圖,回答下面小題。

1用燈泡模擬太陽(yáng),用地球儀觀察晝夜現(xiàn)象,需要選擇的是

A. B. C. D.

2演示地球自轉(zhuǎn),正確的做法是

A. 面向地球儀,自左向右撥動(dòng)地球儀

B. 將地球儀垂直放在桌面上

C. 地軸的指向有規(guī)律的發(fā)生變化

D. 移動(dòng)地球儀沿橢圓軌道做水平運(yùn)動(dòng)

3演示結(jié)束后,同學(xué)們分別繪制了地球自轉(zhuǎn)示意圖(如圖),其中最合理的是

A. B. C. D.

【答案】

1D

2A

3B

【解析】人們根據(jù)地球的大小,按一定的比例縮小成一個(gè)模型就成了地球儀,地球自轉(zhuǎn)的方向是自西向東,太陽(yáng)直射點(diǎn)會(huì)在南北回歸線之間來(lái)回移動(dòng)。

1用燈泡模擬太陽(yáng),用地球儀觀察晝夜現(xiàn)象,需要選擇的是不透明球體,才能體現(xiàn)晝夜現(xiàn)象,故選D。

2演示地球自轉(zhuǎn),面向地球儀,自左向右撥動(dòng)地球儀;將地球儀斜放在桌面上;地軸的指向保持不變;地球儀保持不動(dòng),故選A。

3地球在自轉(zhuǎn)時(shí),面向太陽(yáng)這一面是晝半球,背向太陽(yáng)這一面是夜半球,晝半球與夜半球的分界線與太陽(yáng)光垂直,故選B。

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