Concept 4 Quiz

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Describe the process of isostasy and the role of isostatic adjustment during changes in crustal elevations.

This activity contains 10 questions.

	As erosion lowers the peaks of mountains, isostatic adjustment gradually lowers the mountains in response.

	True False

The elevation of a thin piece of continental crust will be __________ compared to the elevation of a thick piece of continental crust.

lowerthe sameoverturnedthickenedhigher

The thickest part of the crust occurs in regions of

young mountainsocean basincratonscontinental wedgesold eroded mountains

	All crustal uplift is associated with active mountain building.

	True False

	Isostasy is the concept of crustal rocks floating in gravitational balance.

	True False

Which concept describes the process of crustal rocks resting in gravitational balance on top of denser rocks?

orogenesistensionisostasydip-slipnone of the above

After significant melting since the Pleistocene Ice Age glaciation, parts of Canada's Hudson Bay region have experienced

gravitational collapsecrustal reboundcrustal subsidencethickeningall of the above

	Mountains can withstand gravitational collapse when compressional forces are weaker than the vertical force of gravity.

	True False

The higher elevations of mountains are isostatically supported by deep buoyant crustal

terranesbranchesblocksrootsnone of the above

	The continental crust is generally more dense than the mantle.

	True False

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Concept 4 Quiz

As erosion lowers the peaks of mountains, isostatic adjustment gradually lowers the mountains in response.

The elevation of a thin piece of continental crust will be __________ compared to the elevation of a thick piece of continental crust.

The thickest part of the crust occurs in regions of

All crustal uplift is associated with active mountain building.

Isostasy is the concept of crustal rocks floating in gravitational balance.

Which concept describes the process of crustal rocks resting in gravitational balance on top of denser rocks?

After significant melting since the Pleistocene Ice Age glaciation, parts of Canada's Hudson Bay region have experienced

Mountains can withstand gravitational collapse when compressional forces are weaker than the vertical force of gravity.

The higher elevations of mountains are isostatically supported by deep buoyant crustal

The continental crust is generally more dense than the mantle.