Problem 2
Which of the following terms is used to indicate the region where no earthquake waves reach Earth's surface? A. light zone C. shadow zone B. waveless zone D. seismic zone
Problem 3
Fill in the blanks with the correct words. The point on Earth's surface directly above the earthquake focus is the ____________.
Problem 3
Which is used to measure magnitude? A. Richter scale C. shadow zone B. Mercalli scale D. seismic gap
Problem 4
What is earthquake intensity? A. a measure of energy released B. a measure of seismic risk C. a measure of damage done D. a measure of an earthquake's focus
Problem 4
Fill in the blanks with the correct words. The measure of the energy released during an earthquake is its ___________.
Problem 5
Which of the following describes liquefaction? A. the stopping of S-waves by Earth's molten outer core B. ice melting during an earthquake to cause flooding C. seismic waves shaking sediment, causing it to become more liquid like D. rivers diverted by the motion of earthquake flooding
Problem 5
Fill in the blanks with the correct words. An earthquake under the ocean can cause \(a(n)\) __________ that travels thousands of kilometers.
Problem 6
Which of the following describes the motion of secondary waves? A. a backward rolling and a side-to-side swaying motion B. a back-and-forth motion that is parallel to the direction of travel C. vibration in directions that are perpendicular to the direction of wave travel D. a forward rolling motion
Problem 6
Earthquakes can occur when which of the following is passed? A) tension limit C) elastic limit B) seismic unit D) shear limit
Problem 7
When the rock above the fault surface moves down relative to the rock below the fault surface, what kind of fault forms? A) normal C) reverse B) strike-slip D) shear
