【題目】 2018年國慶節(jié)假期，某校組織七年級學(xué)生走進河北地質(zhì)大學(xué)地球科學(xué)博物館，在這里，同學(xué)們可以了解到宇宙的奧秘、地球的圈層結(jié)構(gòu)、地球的運動和地球的內(nèi)外動力作用，還可以了解地球演變過程中遺存的各種古生物化石。

據(jù)此結(jié)合所學(xué)知識，完成以下面小題。

【1】地球是人類共同的家園，下列有關(guān)地球的說法正確的是（ ）

A.地球是正球體B.地球的平均半徑為6378千米

C.哥倫布的環(huán)球航行證明地球是圓的D.地球的表面積約為5.1億平方千米

【2】下列關(guān)于地球運動產(chǎn)生的現(xiàn)象，說法正確的是（ ）

A.地球公轉(zhuǎn)時，地軸指向北極星

B.地球公轉(zhuǎn)和自轉(zhuǎn)時方向一致，都是自東向西

C.地球自轉(zhuǎn)時，產(chǎn)生了四季更替

D.地球自轉(zhuǎn)時，產(chǎn)生了晝夜更替現(xiàn)象

【3】考古學(xué)家在喜馬拉雅山上發(fā)現(xiàn)海洋生物化石，這說明了地球曾經(jīng)發(fā)生過什么演變（ ）

A.這里曾經(jīng)是陸地B.這里曾經(jīng)是海洋，后來地殼變動，成為高山

C.這里曾經(jīng)發(fā)生地震D.登山者曾改造過這里

【答案】

【1】D

【2】D

【3】B

【解析】

【1】地球是一個赤道略鼓，兩極稍扁得不規(guī)則的球體，故A不正確；地球的平均半徑為6371千米，故B不正確；麥哲倫的環(huán)球航行證明地球是圓的，故C不正確； 地球的表面積約為5.1億平方千米，故D正確。根據(jù)題意選D。

【2】地球公轉(zhuǎn)時，地球的北極始終指向北極星附近，故A不正確；地球公轉(zhuǎn)和自轉(zhuǎn)時方向一致，都是自西向東，故B不正確；地球公轉(zhuǎn)時，產(chǎn)生了四季更替，故C不正確；地球自轉(zhuǎn)時，產(chǎn)生了晝夜更替現(xiàn)象，故D正確。根據(jù)題意選D。

【3】世界上的地殼是運動的，考古學(xué)家在喜馬拉雅山上發(fā)現(xiàn)海洋生物化石，這說明了這里曾經(jīng)是海洋，后來地殼變動，成為高山。故選B。

該題考查地球的大小、地球的運動和海陸的變遷。分析解答即可。

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