1- The point on the surface of the Earth that lies directly above the place wher

Question

1- The point on the surface of the Earth that lies directly above the place where a slip on a fault occurs is the ________.

A- Hypocenter

B- Focus

C- Epicenter

D- All of the above

2- Which is the correct sequence of seismic waves that will be recorded at a distance from the epicenter?

first to arrive                       last to arrive

A- S-waves/ surface waves/ P-waves

B- Surface waves/ P-waves / S-waves

C- P-waves/ S-waves/ Surface waves

D- Bogus question: all seismic waves travel at the same velocity

3- The ____ is a qualitative assessment depending on the amount of ground shaking at a particular location, and thus property damage.

A- Moment magnitude

B- Richter scale

C- Modified Mercalli intensity scale

D- Roberts observation scale

4- A convergent boundary is associated with a(n) ____ continental margin?

A- Active

B- Passive

C- Marginal

D- Conformable

5- How would you estimate the age of the sandstone unit?

6- As exemplified by Mount Shasta in California, ___________ volcanoes tend to have a steeper-sloped profile resulting from alternating pyroclastic and high-viscosity lava flows.

7- The difference between basalt and gabbro is ______________.

8- Volcanoes occur at ___________.

9- describes how minerals can form?

10- Igneous rocks _________.

Explanation / Answer

1) C - Epicenter. Because the epicenter is the point on the earth's surface vertically above the hypocenter (or focus). Here at the slip of the fault, the seismic waves are originated. This is denoted as focus. It is centered on the part of the fault that has the greatest movement. So here the epicenter is on the earth's surface directly above the focus.

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