Ch 1 test B Flashcards
Vibrations of energy that flow from the focus of an earthquake are called
a. seismic waves
b. eruptions
c. seismographs
d. tsunamis
A. seismic waves
Fast moving waves that occur beneath the surface of the earth are called
a. surface waves
b. love waves
c. body waves
d. Rayleigh waves
C. body waves
The ________ is the point of the earth’s surface directly above the focus of an earthquake.
a. mantle
b. Rayleigh
c. magnitude
d. epicenter
d. epicenter
________ are slower destructive waves that occur on the surface of the earth.
a. surface waves
b. S waves
c. Body waves
d. P waves
A. Surface waves
An earthquake’s magnitude can be measured by ______.
a. the Mercalli scale
b. a geodometer
c. seismograph
d. the Richter scale
D. the Richter Scale
A _______ detects, times, and measures the movements of the earth.
a. geodometer
b. seismograph
c. tiltmeter
d. pictograph
B. seismograph
One danger of volcanoes is a __________. which occurs when part of a mountain collapses, causing mud and rock fragments to surge down the mountain.
a. lava flow
b. pyroclastic flow
c. debris flow
d. Plinian eruption
c. debris flow
A _____, a avalanche-like emission of red-hot dust and gases from a volcanic eruption, killed the people of Pompeii.
a. focal point
b. pyroclastic flow
c. seismograph
d. epicenter
B. pryoclastic flow
How can some volcanoes have more than one kind of eruption?
one eruption can change the conditions inside a volcano causing it to erupt differently the next time it erupts.
In 2011 a volcano in Iceland erupted. Days later, areas across Europe and Asia were covered with volcanic dust and ash, causing potential health problems, especially for people with asthma or other respiratory issues. how did the volcano in Iceland cause the dust and ash problem in places over 1.000 miles away?
Dust and ash can travel great distances being carried by the wind.
