Gervais
Living Physical Geography
iClicker Questions
Chapter 14: Geohazards: Volcanoes and Earthquakes
1. A large ocean wave triggered by an earthquake or other natural disturbance of the ocean floor
is called a:
a. typhoon.
*b. tsunami.
c. P-wave.
d. storm surge.
2. Which of the following is <i>not</i> one of the main volcano forms?
a. stratovolcano
b. shield volcano
c. cinder cone
*d. caldera
3. Mount Fuji in Japan is a/an:
a. cinder cone.
b. extinct volcano.
c. shield volcano.
*d. stratovolcano.
4. Which volcanoes are so broad and gently sloped, that they can be difficult to recognize from
the ground as volcanoes?
*a. shield volcanoes
b. stratovolcanoes
c. cinder cones
d. composite volcanoes
5. The thickness of lava is called:
a. liquefaction.
b. pyroclasticity.
c. lapilli.
*d. viscosity.
6. When mafic lava takes on a blocky, rough surface, it is called:
a. magma.
b. a lahar.
*c. ʻa’ā.
d. pāhoehoe.
7. Which type of lava has a temperature of about 650° to 800° C (1,200° to 1,500° F)?
a. intermediate lava
*b. felsic lava
c. mafic lava
d. andesitic lava
8. As gas forcefully exits a volcano, it blasts rock debris into the air, generating:
a. a fault scarp.
b. aftershocks.
c. tsunamis.
*d. pyroclastics.
9. The strength of volcanic eruptions is ranked using the:
*a. Volcanic Explosivity Index (VEI).
b. Beaufort scale.
c. Saffir-Simpson scale.
d. modified Mercalli intensity (MMI) scale.
10. All volcanoes are found where the mantle is melted into:
a. pyroclastics.
*b. magma.
c. lava.
d. a lahar.
11. What is the most common type of volcanoes in the Pacific Ring of Fire?
a. shield volcanoes
b. cinder cones
*c. stratovolcanoes
d. calderas
12. How many detectable earthquakes occur on the planet each year?
a. more than 5 million
*b. more than 1 million
c. more than 3 million
d. more than 10 million
13. Which type of fault results from compressional force?
*a. a reverse fault
b. a normal fault
c. a pyroclastic fault
d. a strike-slip fault
14. Why do aftershocks often occur after the main earthquake?
a. because a large ocean wave has been triggered by the main earthquake
b. because pyroclastic flows are taking place
c. because small cracks are developing as the deformed and stressed crust is about to fail
*d. because blocks are settling into their new positions after they have been moved
15. Each earthquake is given one magnitude number that indicates:
a. the number of aftershocks for that earthquake.
*b. the maximum shaking at the epicenter.
c. the extent of damage to physical structures at the epicenter.
d. the minimum shaking at the epicenter.