1. What Is The Ultimate Cause Of Movement Within The Earth's Crust
1. What is the ultimate cause of movement within the earth's crust?
ANSWERS: Radioactive decay generates the heat energy that powers movements of plates.
2. What causes earthquakes?
ANSWERS: Friction between the rough edges of slowly moving segments or plates of the earth’s lithosphere result in a series of jerky starts and stops which is the direct cause of most earthquakes.
3. What is a fault?
ANSWERS: Faults are fractures in rocks along which displacement has taken place
4. What happens to the energy released during an earthquake?
ANSWERS: Energy fractures the rock forming a plane of slip called a fault, along which future earthquakes can also occur.
It can also give off seismic waves.
5. Describe how
seismologists use seismic velocities to locate earthquake epicenters.
ANSWERS: Geologists use the P and S Waves to determine where the epicenter is by have many different locations that look for this data. The time interval helps to show where it occurred. The amount it takes two successive waves crests to pass a stationary point is called the wave period.
6. Define a seismic wave period
ANSWERS: Ground motion is similar to the complex sea surface in an ocean storm. There are waves of all different sizes mixed together. The longer waves travel faster and may not die out for hundreds of kilometers.
7. How does the period of an earthquake relate to a building's natural period?
ANSWERS: The time it takes a skyscraper to bend or oscillate back and forth once is called its natural period
8. What happens when they (Building and wave periods) match?
ANSWERS: When the two match, the seismic energy is simply added the oscillation of the building. The swaying of the building increases dramatically.
9. How are water wells used to determine pending earthquake activity?
ANSWERS: As stress accumulsates in the earth, ground water will respond by rising or falling.
10. What factors complicate earthquake prediction?
ANSWERS: Each Fault is unique and successive earthquakes on a given fault can vary considerably.
ANSWERS: Radioactive decay generates the heat energy that powers movements of plates.
2. What causes earthquakes?
ANSWERS: Friction between the rough edges of slowly moving segments or plates of the earth’s lithosphere result in a series of jerky starts and stops which is the direct cause of most earthquakes.
3. What is a fault?
ANSWERS: Faults are fractures in rocks along which displacement has taken place
4. What happens to the energy released during an earthquake?
ANSWERS: Energy fractures the rock forming a plane of slip called a fault, along which future earthquakes can also occur.
It can also give off seismic waves.
5. Describe how
seismologists use seismic velocities to locate earthquake epicenters.
ANSWERS: Geologists use the P and S Waves to determine where the epicenter is by have many different locations that look for this data. The time interval helps to show where it occurred. The amount it takes two successive waves crests to pass a stationary point is called the wave period.
6. Define a seismic wave period
ANSWERS: Ground motion is similar to the complex sea surface in an ocean storm. There are waves of all different sizes mixed together. The longer waves travel faster and may not die out for hundreds of kilometers.
7. How does the period of an earthquake relate to a building's natural period?
ANSWERS: The time it takes a skyscraper to bend or oscillate back and forth once is called its natural period
8. What happens when they (Building and wave periods) match?
ANSWERS: When the two match, the seismic energy is simply added the oscillation of the building. The swaying of the building increases dramatically.
9. How are water wells used to determine pending earthquake activity?
ANSWERS: As stress accumulsates in the earth, ground water will respond by rising or falling.
10. What factors complicate earthquake prediction?
ANSWERS: Each Fault is unique and successive earthquakes on a given fault can vary considerably.