Earthquakes & Volcanoes 1
Earthquakes & Volcanoes 2
Earthquakes & Volcanoes 3
Earthquakes & Volcanoes 4
Earthquakes & Volcanoes 5
100
What type of fault is shown here?
This is a reverse fault.
100
what is the Richter scale?
A mathematical scale that measures the actual amount of seismic activity of an earthquake between 0-10.
100
what is the focus?
The point inside the earth where an earthquake begins
100
what is a seismograph?
An instrument that measures and records earthquake waves
100
what is the epicenter?
The point on earth’s surface directly above the focus
200
what is the mercalli scale?
A scale used to measure an earthquake’s intensity based on eyewitness observations and the resulting damage. For example, dishes rattling or chimneys falling.
200
what are s waves?
second fastest seismic wave, move only through solids
200
what are p waves?
fastest type of seismic wave, move through solids, liquids, and gasses
200
what are surface waves?
Seismic waves that travel only across the earth’s surface. These seismic waves are the most destructive.
200
what is lava?
Magma that has reached earth’s surface
300
what is magma?
Melted rock beneath earth’s surface
300
what is an active volcano?
A volcano that has erupted recently or will erupt soon
300
what is a subduction zone?
A place where one tectonic plate is pushed under another tectonic plate
300
what is a hot spot?
Places on earth’s surface that are directly above a column of rising magma
300
what is a dormant volcano?
A volcano that has not erupted for a long time but may erupt again
400
what is an extinct volcano?
A volcano that can no longer erupt
400
What type of fault is shown here?
This is a strike-slip fault.
400
what are the two ways that volcanoes form?
hot spots & plate boundaries
400
what are aftershocks?
tremors that follow major earthquakes
400
Deep earthquakes often occur along this type of plate boundary.
Convergent plate boundaries where there is subduction.
500
what are the 3 different types of volcanoes?
shield, cinder cone, and composite
500
what is the Ring of Fire?
The rim of the Pacific Ocean, around which many violent volcanoes erupt
500
what is a shield volcano?
volcano built almost entirely of lava
500
what is a cinder cone volcano?
volcano built from ash and cinders
500
what is a composite volcano?
volcano built from lava, ash, and cinders