
B08地殼均衡
Quiz
•
Science
•
9th - 12th Grade
•
Practice Problem
•
Medium
光正 王
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9 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
1850年英國人在喜馬拉雅山山腳下進行測量時得鉛垂線如右圖a。若僅考慮喜馬拉雅山突出地表的影響,而山的底部與其他區的物質密度都相同,則鉛垂線應為何種情形?
a
b
c
以上皆非
Answer explanation
因喜馬拉雅山有密度較小(比測點下方)的山根(山的下方深入地函的底部),造成鉛垂方向為a,若山根的密度變大,將使鉛垂線偏向a的左側。
2.
MULTIPLE SELECT QUESTION
3 mins • 1 pt
1850年英國人在喜馬拉雅山山腳下進行測量時得鉛垂線如右圖a。請問下列何種情形應會使鉛垂線呈現b的狀況?(選2項)
喜馬拉雅山山根密度變大時
喜馬拉雅山山根密度變小時
喜馬拉雅山山根密度和測點同深度的密度一樣時
喜馬拉雅山岩石密度變小時
Answer explanation
山根密度變大或無山根時,都有可能使鉛垂線方向再向圖中的左側偏移
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
1850年英國人在喜馬拉雅山山腳下某地進行測量時得鉛垂線如右圖a。若喜馬拉雅山區所在的板塊厚度受地表侵作用的影響而變薄,依地殼均衡原理,未來在該地測量鉛垂線時會有何種變化?
漸偏向b
漸偏向c
保持不變
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
關於艾里和普拉特的地殼均衡理論,下列何項敘述正確?
艾里可解釋喜馬拉雅山鉛垂異常的現象,但普拉特不行
艾里認為各地地殼的密度均相同,而普拉特則認為不同
艾里認為各地地殼的厚度均不相同,而普拉特則認為皆相同
普拉特對地殼深度的看法與目前板塊學說的的眉法較相近
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
見附圖,依艾里地殼均衡理論,地殼均浮在地函之上,已知a深度各處所受到的上方物質壓力會相等。假設圖中地殼的密度均為2.67g/cm3,試估算「地函」的密度約為多少g/cm3?
2.67
3.27
3.17
3.07
Answer explanation
以最左側的地殼和最厚的地殼作比較,因a深度的壓力均等,設地函密度為D,可列等式30x2.67+26.7xD=(6+30+26.7)x2.67,故D=3.27
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
地殼保持均衡的適切理由為何?
在地殼上有冰川
在地殼有火山噴發與地震的活動
地函熱對流
在地函之中有類似液體性質
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
根據地殼均衡理論,下列何者地殼厚度最大?
中洋脊
夏威夷
東非大裂谷
青藏高原
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