EARTH SCIENCE - Structural Geology QUESTION 1 _____ is the point along a fault w

Question

EARTH SCIENCE - Structural Geology

QUESTION 1

_____ is the point along a fault where slippage (movement) occurs during an earthquake.

Epicenter

Focus

Fault scarp

Footwall

QUESTION 2

The size of the smallest discernable object in an aerial photo is called the

scale

resolution

image transparency

explanation

QUESTION 3

What is the name of the weak ("slushy") sphere in the Earth?

Lithosphere

Inner Core

Mesosphere

Asthenosphere

Ralph

QUESTION 4

A fault in which the hanging wall moves down relative to the footwall is called a _________ fault. If the hanging wall moves up relative to the footwall, the fault is called a __________ fault.

QUESTION 5

The continental crust is made primarily of _________ , whereas the oceanic crust is made from __________ .

QUESTION 6

The time difference between the arrival of the first P waves and the arrival of the first S waves at a seismic station is ______

a function of the intensity of the earthquake.

used to determine the distance to the location of the earthquake.

related to the air temperature.

dependent on the type of seismograph used.

QUESTION 7

A fault is ______

a fracture in the Earth's crust where no movement has occurred.

a bending of the crust that results from extensional forces.

a fracture in the crust along which there has been significant movement.

the same as a joint or fracture.

QUESTION 8

A typical rate for seafloor spreading is ___.

2 inches per year

2 feet per year

20 feet per year

20 cm per year

QUESTION 9

This layer is the outermost layer of the Earth. It ranges in thickness from 5 - 70 kilometers.

Crust

Asthenosphere

Mesosphere

Uppermost mantle

QUESTION 10

New oceanic crust is formed at ________ plate boundaries, whereas oceanic crust is destroyed at __________ plate boundaries.

Epicenter

Focus

Fault scarp

Footwall

Explanation / Answer

Question 1) answer) option b) focus

Reason : Focus is the point which is inside the earth where the slippage(movement) originates and also a lot of energy is released in the process

Question 2) answer) option b) resolution

Reason : Resolution is the smallest discernable object in an aerial photo

Question 3) answer) option d) asthenosphere

Reason : Asthenosphere is termed as weak sphere because it is soft , viable and warm which is also under lithosphere

Question 4) a) normal fault is the fault in which the hanging wall moves down relative to the footwall

b) Reverse fault is the fault in which the hanging wall moves up relative to the footwall

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