Question 31 P- and S-waves do not follow simple paths as they pass through the E

Question

Question 31

P- and S-waves do not follow simple paths as they pass through the Earth; they speed up, slow down, and change direction, and S-waves even disappear when they reach the Earth's core.

True

False

1 points

Question 32

The Earth's interior is homogeneous.

True

False

Question 33

Bracing with ductile materials is an excellent way to impart seismic resistance to a structure since ductile materials can deform without rupturing

True

False

Question 34

Modern designs employ base isolation in which devices are placed on the ground or within the structure on ground or within the structure to absorb part of earthquake energy

True

False

Question 35

Earthquake intensity scales such as the Modified Mercalli scale assess the effects on people and buildings.

True

False

Question 36

The types of rock or sediment on which a structure's foundation sits are of paramount importance with respect to whether the structure will be damaged by shaking from an earthquake.

True

False

Question 37

The time of day of an earthquake is not a critical factor affecting loss of life from earthquakes.

True

False

Question 38

Earthquakes are most commonly caused by ______________.

;

explosions of nuclear bombs

undersea landslides

meteorite impacts

volcanic activity

sudden earth movements along faults

Question 39

The _________ explains that sediments (such as sands, gravels, and muds) are originally deposited or settled out of water in horizontal layers.

;

law of original continuity

law of superposition

law of original horizontality

law of cosines

law of retrogression

Question 40

In the ________, Steno stated that in an undeformed sequence of sedimentary rock layers, each sedimentary rock layer is younger than the bed beneath it, but older than the bed above

;

law of original continuity

law of superposition

law of original horizontality

law of cosines

law of retrogression

;

explosions of nuclear bombs

undersea landslides

meteorite impacts

volcanic activity

sudden earth movements along faults

Explanation / Answer

31) true. They change their velocities when ever there is a change in composition,density of rocks. And S waves are absent only in outer core

32) false

33)

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