true or false
14. the best earthquake warning systems can give up to a one - hour notice in advance of an earthquake.
15. any change of shape of an object due to stress is called strain.
16. rocks that are elastic and store energy are more seismically dangerous than brittle rocks.
17. a fault may have many strikes and dips along its length.
18. faults are classified mainly by their geologic ages.
19. seismic gaps might be caused by locked faults.
20. earthquakes may occur anywhere from the surface of the earth to its core.
21. the richter scale is based on how an earthquake feels and the amount of damage that it can cause.
22. the destructiveness of an earthquake is related only to its magnitude.
23. the wealthier a nation, the better able it is to protect its citizens from natural disasters.

Question

Accepted Answer

### Question 14
# Brief Explanations:
Earthquake warning systems currently can give only a few seconds to a minute or so of warning, not up to an hour. So the statement is false.
# Answer:
False

### Question 15
# Brief Explanations:
Strain is defined as the change in shape (or size) of an object due to applied stress. So the statement matches the definition.
# Answer:
True

### Question 16
# Brief Explanations:
Elastic rocks store energy and when they release it (after being stressed), they can cause more seismic activity (like larger earthquakes) compared to brittle rocks which break more easily without storing as much energy. So elastic, energy - storing rocks are more seismically dangerous.
# Answer:
True

### Question 17
# Brief Explanations:
A fault can have variations in its strike (the direction of the fault line on the surface) and dip (the angle at which the fault plane is inclined from the horizontal) along its length due to the complex geological processes that form and modify faults.
# Answer:
True

### Question 18
# Brief Explanations:
Faults are mainly classified by their movement type (e.g., normal, reverse, strike - slip) rather than their geologic ages. So the statement is false.
# Answer:
False

### Question 19
# Brief Explanations:
Locked faults are areas where the fault is not slipping (so no small earthquakes), and stress builds up. This can lead to a seismic gap (an area with little recent seismic activity but potential for a large quake). So seismic gaps can be caused by locked faults.
# Answer:
True

### Question 20
# Brief Explanations:
Earthquakes occur within the Earth's crust and upper mantle (up to about 700 km depth), not all the way to the core (the core is much deeper and under different conditions). So the statement is false.
# Answer:
False

### Question 21
# Brief Explanations:
The Richter scale is based on the amplitude of seismic waves recorded by seismographs, not on how an earthquake feels or the damage it causes (the Mercalli scale is related to how it feels and damage). So the statement is false.
# Answer:
False

### Question 22
# Brief Explanations:
The destructiveness of an earthquake is related to magnitude, but also to factors like depth of the earthquake, distance from populated areas, building construction quality, and soil type. So it's not only related to magnitude.
# Answer:
False

### Question 23
# Brief Explanations:
Wealthier nations generally have better infrastructure, early warning systems, and resources to protect citizens from natural disasters (like better - built buildings, disaster response plans). So the statement holds.
# Answer:
True

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Explanation:

Question 14

Answer:

Question 15