Earthquakes
Any trembling of the earth's crust is defined as this.
What are Earthquakes?
This allows molten rock and hot gases to escape from within the earth.
What is a Volcano?
The process by which new soil is formed rocks crumble and break into smaller pieces.
What is Weathering?
A volcano that has erupted recently.
What is Active?
The strength of an earthquake.
What is magnitude?
Earthquakes sometimes cause monstrous waves called this.
What are Tsunamis?
This is created when trapped gases blast through the earth's surface.
What is a Vent?
This occurs when natural acids slowly eat into a rock, breaking it apart.
What is Chemical Weathering?
A volcano that has not erupted in recorded history.
Holes or cracks which serve as escape vents for underground gases.
What are fumaroles?
A break that appears at the boundary between two moving masses of rock is known as this.
What is a Fault?
Magma that has reached the earth's surface.
What is Lava?
The study of earthquakes.
What is Seismology?
A volcano that has been active at some time in recorded history, but has not had a recent eruption.
What is Dormant?
The liquid innermost layer of the Earth.
What is the Inner Core?
The point underground where an earthquake begins.
What is Focus?
A depression caused at the top of a volcano.
What is a Crater?
The underwater mountain ranges.
What are Mid-Oceanic Ridges?
A volcano that produces lava fountains or fire curtains.
What is Hawaiian?
Mt. St. Helens is an example of this type of volcano.
What is Composite?
The place at ground level that is directly above an earthquake's focus.
What is the Epicenter?
Smaller fragments of molten rock that solidify almost instantly.
What is Tephra?
The boundary between the earth's crust and its mantle.
What is Moho/Mohorovičić discontinuity?
A volcano characterized by hot clouds of gas and dust that it expels.
What is Plinian?
The temperature of rocks do this as you go deeper into the layer of the Earth.
What is Increase?