QUIZ 5
QUIZ 5
1. The scientific study of earthquakes and seismic waves is known as _______.
o [pic]C) seismology
2. Fragments of unmelted rocks that are sometimes incorporated in magma are known as _______.
o [pic]E) xenoliths
3. _______ are the first waves to leave the focus after an earthquake.
o [pic]A) P-waves
4. The _______ is the part of the Earth's interior where rocks start to melt.
o [pic]B) asthenosphere
5. A _______ wave is an elastic rebound wave that travels outward in all directions from the point of an earthquake.
o [pic]E) seismic
For questions 6 and 7 refer to the figure below:
[pic]
6. In the figure above, what is the approximate time of the arrival of the P-waves?
o [pic]B) 2 minutes, 15 seconds
7. According to the figure above, what is the approximate S-P travel time?
o [pic]A) 1 minute, 45 seconds
8. Using data from three locations to find the epicenter of the earthquake, is called the method of ___________________
o [pic]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 [pic]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 [pic]radius
[pic]
11. In the figure above, the largest earthquakes correlate with which type of plate boundaries?
o [pic]Subduction zones (continental - oceanic)
[pic]
12. In the figure above, what is the approximate speed of S-waves and the P-waves as the earthquake starts?
o [pic]B) 3km/sec and 6km/sec
True/False
13. The Earth's density as a whole is approximately 2.8 g/cm3.
o [pic]True
14. P-waves travel by compression-expansion.
o [pic]True
15. The mantle makes up roughly 80% of the Earth's volume.
o [pic]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
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