True or False
Volcanic Fog is called Smog
False
______ occurs when rocks move apart, forming a gap
Normal Fault
What could cause a volcanic eruption?
A. Weather Changes
B. A hot spot
C. Heated magma rising to the surface
D. Acid Rain
B. A hot spot
C. Heated magma rising to the surface
______ are slower destructive waves that occur on the surface of the earth.
Surface Waves
Magma that breaks through the earth’s surface is called
Lava
Hot Springs occur in places where water is heated by hot magma
True
____ occurs when rocks move horizontally past each other
Strike-slip fault
What causes an earthquake? Choose all that apply
A. When molten rock moves under a volcano
B. Tsunami
C. The buildup and release of energy when two surface plates move or shift
D. When large amount of earth are removed or added
A. When molten rock moves under a volcano
B. Tsunami
C. The buildup and release of energy when two surface plates move or shift
______ detects, times, and measures the movements of the earth.
Seismograph
Breaks in the earth’s surface along which rock can move are called
Faults
The area around the Pacific Ocean where many volcanoes occur is called the Ring of Fire
True
_______ occurs when rocks push together, forcing a section of rock upward
Thrust, reverse fault
The _______ is the point on the earths surface directly above the focus of an earthquake.
A. Mantle
B. Rayleigh Wave
C. Magnitude
D. Epicenter
D. epicenter
One danger of volcanoes is a ____, which occurs when part of a mountain collapses, causing mud and rock fragments to surge down the mountain.
Debris Flow
The beginning point of an earthquake is called its
Focus
The idea that the earth's crust is made up of moving plates is called the theory of plate tectonics
True
Vibrations of energy that flow from the focus of an earthquake are called ________
Seismic Waves
An earthquake's magnitude can be measured by
A. The Mercalli scale
B. A Geodometer
C. A Seismograph
D. The Ritcher Scale
D. The Ritcher Scale
A _____ volcano is expected to erupt again within the next five years. It has a bowl-like crater at its top and only one main vent.
Active cinder cone volcano
The strength of the seismic waves of an earthquake is called its
Magnitude
The lithosphere is located beneath the mantle of the earth
False
Fast moving waves that occur beneath the surface of the earth are called _________
Body Waves
A ____, an 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. pyroclastic flow
______ volcano seems to be layered, signifying that different types of lava flows have occurred in the past, but the volcano is presently inactive.
______ is a gradually sloping volcano that has mild eruptions and a continuous flow of lava. Scientists will study the composition of the gathered lava.
Active Shield Volcano