Quiz Answers:

Q1: A earthquake focus that is 50 km deep is considered to be a "deep" earthquake

Ans: False

Q2: How do "seismic waves" occur?

Ans: Caused by the vibrations of rock and earth movements at plate boundaries

Q3: When referring to earthquakes, what is a "fault"?

Ans: It is caused by two parts of the earth’s crust moving against each other over a long period of time

Q4: What's the "Richter Magnitude Scale"?

Ans: A calculation of the amplitude of the largest seismic wave released by an earthquake

Q5: What scale is used to measure earthquakes?

Ans: Richter Scale

Q6: What is the center of an earthquake as measured from the ground surface called?

Ans: Epicenter

Q7: What do scientists believe causes the most earthquakes?

Ans: Plates rubbing together

Q8: Going up one whole unit on the Richter scale represents

Ans: a 10-fold increase in damage done by the quake

Q9: Which country is located along a plate boundary?

Ans: United States of America

Q10: The point on the Earth directly above the hypocenter of a quake is called?

Ans: Epicenter

Q11: What Richter magnitude of quakes is recorded most often around the world every year?

Ans: 2.0-3.4  

Q12: Please write down the relationship between earthquakes and plate boundaries

Ans:  Geologists currently believe that the Earth's surface is covered with

a number of tectonic plates that are constantly moving (very

slowly). The majority of earthquakes result from the interaction of

forces stemming from plate tectonic activity. When a tectonic plate

moves or shifts, it releases energy and result in earthquakes.

Q13: Please write down the difference between a focus and an epicenter

Ans:  The focus is the location within the earth where underground rock moves

and sends out earthquake waves.  Earthquake foci occur at a range of

depths.

The epicenter is the point at the ground level directly above the focus.