seismic waves & earthquakes
monitoring earthquakes
Volcanoes and Plate Tectonics
Properties of magma and eruptions
volcanic landforms
100
The three types of seismic waves
What are P waves, S waves, and Surface waves
100
The instrument used to measure seismic waves
What is a seismograph
100
The volcanic belt that circles the Pacific ocean
What is the Ring of Fire
100
two common types of lava
What are aa and pahoehoe
100
a volcano formed from thin layers of lava flows
What is a shield volcano
200
The area beneath Earth's surface where an earthquake originates
What is the focus
200
The three commonly used scales for measuring earthquakes
What are the Richter scale, the Moment Magnitude scale, and the Mercalli scale
200
The two types of boundaries where volcanoes occur with the highest frequency
What are convergent and divergent boundaries
200
How easily a liquid flows
What is viscosity
200
A volcano that has lava with high viscosity, and therefore explosive eruptions
What is a cinder cone volcano
300
The point on the surface directly above the focus
What is the epicenter
300
This scale measures the level of damage at a given place
What is the Mercalli scale
300
The Hawaiian islands formed when the Pacific Plate moved over this
What is a hot spot
300
A liquid that flows very easily (such as water) is said to have _______ viscosity
What is low
300
the huge hole left by the collapse of a volcanic mountain
What is a caldera
400
These waves compress and expand like an accordion, and arrive first
What are P waves
400
The number of seismograph readings that are needed to find an earthquake's epicenter
What is three
400
A curved string of islands that echo the curve of a deep ocean trench
What is an island arc
400
the three stages of a volcano's activity
What are active, dormant, and extinct
400
Volcanic soil is said to be _________, or able to support plant growth
What is fertile
500
Scientists use the difference in arrival times between these to help locate the epicenter
What are P and S waves
500
The types of plate boundary where earthquakes occur with the highest frequency
What are transform boundaries
500
A chain of volcanoes along the boundaries of Earth's plates
What is a volcanic belt
500
The two types of eruptions
What are quiet and explosive eruptions
500
Two types of geothermal activity that are often found in areas of present or past volcanic activity
What are hot springs and geysers
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