A volcano that is erupting or has shown signs that it may erupt in the future.
What is an active volcano?
100
An instrument used to measure and record ground movbements during an earthquake is called
What is a seismogram?
100
This type of fault forms when the hanging wall moves upward past the footwall
What is a reverse fault?
100
The force that acts on rock to change its shape or volume
What is stress?
100
This is a large area of land that is elevated high above sea level.
What is a Plateau?
200
An area where magma melts through the crust in the middle of a plate.
What is a hot spot?
200
The point beneath Earth's surface where the crust breaks and triggers an earthquake.
What is a focus?
200
A break in the crust where slabs slip past each other/.
What is a strike-slip fault?
200
These are two types of folds.
What are anticlines and synclines?
200
Liquid flows up through the crust because it is...
What is less dense than the solid material around it?
300
Inside a volcano, magma collects in a pocket called this.
What is a magma chamber?
300
This is the point on Earths surface directly above an earthquake's focus and is located by drawing circles to show the distance from three seismograph stations.
What is the epicenter?
300
Laser ranging devices detect even tiny movements of the crust along this.
What is a fault?
300
The type of stress that produces a strike-slip fault
What is shearing?
300
This is a scale that rates the total energy released by an earthquake
What is the moment magnitued scale?
400
This is a belt of volcanoes around the Pacific ocean.
What is The Ring of Fire?
400
Vibrations that move through the ground carrying the energy released during an earthquake.
What are seismic waves?
400
A valley that dips between two parallel ranges of hills was formed by downward fold in a rock called this
What is a syncline?
400
Folding produces these.
What are anticlines and synclines?
500
This type of wave arrives after P (primary) waves.
What are S (secondary) waves?
500
The ____ scale accurately rates the size of the ____ waves for only small, ____ earthquakes.
What is richter, siesmic, nearby?
500
The block of rock that lies above a fault
What is a hanging wall?
500
This type of stress pushes masses of rock sideways in opposite directions.
What is shearing?
500
A string of islands known that can form from the collision of two oceanic plates.