Which of the following is true about P- and S-waves?
a. P-waves travel faster than S-waves
b. Only P-waves are detected in seismographic stations
c. S-waves reach the surface of the Earth faster than P-waves do
d. Either of P- or S-waves is required to triangulate the location of the
epicenter
5. Which of the following was formed by volcanoes?
a. Africa b. Greenland c. Hawaii d. India
6. Where does the lava from volcanoes come from?
a. Igneous rock b. Core c. Sedimentary rock d. Mantle
7. When two plates crash into each other, what is typically formed?
a. Land b. volcano c. desert d. mountains
The last time Olympus Mons on Mars erupted was 25 million years ago. What
type of volcano is Olympus Mons?
a. Active c. potentially active
b. Inactive d. semi-active
11. A composite volcano that erupts continuously for two hours is accompanied
by a tropical storm. What would likely happen in the scenario?
a. Lava will react to water producing sulphuric acid, affecting the ozone
layer.
b. The volcano will continue to spew out cinders and ash in large volume.
c. Lahar will form and will flood the areas surrounding the volcano.
d. The tropical storm will become stronger and flood will occur.
12. If an S-wave passes through a liquid what will happen to its velocity?
a. increase c. stay the same
b. decrease d. increases twice
13. An area where a large number of volcanic eruption and earthquakes occur.
a. mountain range c. epicenter
b. hot spots d. the ring of fire
14. The point on the Earth surface directly above the focus where the
earthquake originates.
a. plate c. fault
b. epicenter d. boundary
15. Oceanic plates are ____ into continental plates upon converging.
a. pulled c. extended
b. sub ducted d. cracked