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Earthquakes
Earthquakes II
Vocabulary
Volcanoes
Volcanoes II
100
Smaller earthquakes that occur in an area shortly after a larger earthquake are called....
Aftershocks
100
_________ are water waves triggered by an earthquake
Tsunamis
100
Scientist measure earthquake waves with a
Seismograph
100
Melted rock that flows onto Earth's surface is...
lava
100
Hot melted rock underground is called...
Magma
200
Most earthquakes occur....
Along tectonic plate boundaries
200
When an earthquake occurs, the first seismic waves to reach a nearby city are....
Primary Waves
200
A vibration of the earth's crust is an...
Earthquake
200
This is made up of tiny pieces of ash
Volcanic Ash
200
Inside a volcano, magma is stored in the....
Magma Chamber
300
Earthquakes release energy in the form of.....
seismic waves
300
In which type of fault are the blocks moving apart
Normal
300
Most of the magma from a volcano comes up through a rocky opening called a...
Vent
300
This is a landslide that occurs when loose rock and soil are mixed with water
Mudflow
300
When one plate sinks under another it is called
Subduction
400
To locate the epicenter of an earthquake, scientist need seismograms from at least ______ seismic stations
Three
400
The ____________ is used to measure the magnitude of an earthquake.
Richter Scale
400
The point of Earth's surface directly above an earthquake's focus is the
Epicenter
400
This is made up of a belt of more than 400 volcanoes
The Ring of Fire
400
The two main gases in volcanic eruptions are.....
Carbon dioxide and sulfur dioxide
500
Why don't earthquakes occur in the asthenosphere?
Rocks in this layer are hot and soft and bend rather than break
500
This fault occurs along divergent plate boundaries
Normal
500
A dense cloud of super-hot gases and rock fragments that races downhill form an erupting volcano is called a....
Pyroclastic Flow
500
_______ are rock fragments that contain holes
Cinders
500
A ________ is a huge crater caused by the collapse of a volcano
Caldera