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Plate Tectonics

Across
An instrument used to measure the magnitude of earthquakes
Describes the amount of seismic energy released during an earthquake.
A small earthquake in underground caverns and mines that are caused by seismic waves produced from the explosion of rock on the surface
'sleeping' volcano, can become active again in the future.
A result of movements within the earth's crust
Dissolved gases in magma builds up until it explodes, erupting gases, steam, and magma with incredible force.
The type of earthquake that occurs when the earth's crust breaks due to geological forces on rocks and adjoining plates that cause physical and chemical changes
Valleys created when convergent plates meet
Magma oozes quietly from the vent of the volcano
An earthquake that occurs after a previous earthquake
The type of earthquake that is the result of the detonation of a nuclear and/or chemical device
Major volcanic belt formed by the many volcanoes that rim the Pacific Ocean.
Down
volcano that is unlikely to erupt again.
Ridges created when convergent plates meet
A weak spot in the Earth's crust where magma comes to the surface.
The theory that Earths's outer shell is divided into several plates
An instrument that measures and records details of earthquakes
A volcano that is erupting or shows signs of erupting.
What happens when Convergent plates meet, forming upfolds and downfolds
The type of earthquake that results from tectonic forces which occur in conjunction with volcanic activity