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Earthquakes
Earthquakes II
Volcanoes
Volcanoes II
100
The three types of seismic waves.
What are P waves, S waves, and surface waves?
100
Secondary (S) waves cannot travel through a planet where the core is ________.
What is liquid?
100
Tectonic plates move apart at a ________ plate boundary.
What is divergent?
100
Magma that is squeezed and hardened between two layers of rock.
What are sills?
200
This instrument records seismic waves.
What is seismograph?
200
Strike-slip faults usually occur along this type of plate boundary.
What is transform?
200
This results when an empty magma chamber collapses.
What is a caldera?
200
This takes many forms, including volcanic bombs, volcanic blocks, and ash.
What is pyroclastic material?
300
The bending of rock.
What is deformation?
300
This is where an earthquake's seismic waves originate.
What is focus?
300
Another name for magma that has reached the surface of the Earth.
What is lava?
300
Parts of tectonic plates that are located above magma plumes.
What is hot spots?
400
This type of seismic wave is slower than the others but causes more damage.
What is surface waves?
400
A scale that measures the relative strength of an earthquake.
What is Richter scale?
400
Magma formations that cut across existing rock layers.
What are dikes?
400
This type of volcano throws out mostly pyroclastic material during an eruption.
What is cinder cone?
500
Earthquakes are caused by changes due to ________ in the Earth's crust.
What is faulting?
500
A scientist who studies seismic waves.
What is a seismologist?
500
This type of volcano has gentle slopes and its eruptions produce easy flowing lava.
What is shield?
500
This type of volcano releases both pyroclastic material and lava during an eruption.
What is composite (stratacone)?