QUIZ 5
1. The scientific study of earthquakes and seismic waves is known as _______.
o
C) seismology
2. Fragments of unmelted rocks that are sometimes incorporated in magma are
known as _______.
o
E) xenoliths
3. _______ are the first waves to leave the focus after an earthquake.
o
A) P-waves
4. The _______ is the part of the Earth's interior where rocks start to melt.
o
B) asthenosphere
5. A _______ wave is an elastic rebound wave that travels outward in all
directions from the point of an earthquake.
o
E) seismic
For questions 6 and 7 refer to the figure below:
6. In the figure above, what is the approximate time of the arrival of the P-waves?
o
B) 2 minutes, 15 seconds
7. According to the figure above, what is the approximate S-P travel time?
o
A) 1 minute, 45 seconds
8. Using data from three locations to find the epicenter of the earthquake, is called
the method of ___________________
o
c) triangulation
9. The _________ interval is the time difference between the arrival of the
primary and secondary waves, this is then used to calculate the distance from the
seismograph to the earthquake.
o
S-P
10. On the circle that is drawn using the distance calculated from the difference of
the arrival of primary and secondary waves, gives you the _____________ of the
circle.
o
radius
11. In the figure above, the largest earthquakes correlate with which type of plate
boundaries?
o
Subduction zones (continental - oceanic)
12. In the figure above, what is the approximate speed of S-waves and the Pwaves as the earthquake starts?
o
B) 3km/sec and 6km/sec
True/False
13. The Earth's density as a whole is approximately 2.8 g/cm3.
o
True
14. P-waves travel by compression-expansion.
o
True
15. The mantle makes up roughly 80% of the Earth's volume.
o
True
Fill in the blank
16. A large, destructive wave sometimes caused by am earthquake is called a
_______. TSUNAMI
17. _______ is the bouncing back of a wave from an interface between two
mediums. REFLECTION
18. S waves cannot travel through ____________ LIQUIDS
19. ______________ happens when a wave increases or decreases its speed when
it changes of medium. REFRACTION
20. The theory that stress is continually built up along a fault and released when
earthquake occurs is known as the _______ rebound theory. ELASTIC
21. The method of using data from three seismic stations to locate an earthquake
is known as _______. TRIANGULATION
22. _______ are fragments of unmelted rock that are sometimes incorporated in
magma. XENOLITHS
23. The area inside the Earth where rocks start to turn plastic is known as the
_______. ASTHENOSPHERE