Why do structures located on thick, soft sediment, especially water-saturated or artificial fill, suffer
much greater damage than structures built on bedrock? What will be an ideal response?
Surface waves cause this material to shake, lose its cohesiveness, and collapse. Sometimes they mix
with water and move like a fluid, in a process called liquefaction.
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The main cause of caldera collapse is
A) a fissure eruption that allows the shield volcano to split into two or more parts. B) collapse of the north flank by landslides. C) removal of magmas that form pillow basalt. D) collapse of the roof of a magma chamber as magma erupts. E) All of these are correct.
Bullets are fired from an airplane in the forward direction of motion. The momentum of the airplane will be
A) decreased. B) unchanged. C) increased.
The feature identified by Letter D is:
A) the storm's anvil. B) the gust front. C) experiencing very calm conditions. D) a cold front.
Europeans, North Americans, and East Asians capitalized on the natural resources of the Pacific Islands by expanding farms of native island species such as mangoes, sugarcane, coffee, and livestock
a. True b. False Indicate whether the statement is true or false