Earth
Scientist who study the earth.
Geologist
The study of earthquakes.
Seismology
Magma turns to this when it reaches the earth's surface.
Lava
Paricutin is an example of this type of volcano.
Cinder Cone
The term given when a volcano erupts often.
Active
The boundary between the earth's crust and its mantle.
Moho or Mohorovicic discontinuity
The trembling or shaking of the earth's crust is defined as one.
Earthquake
The depression that is found at the top of a volcano.
Crater
The type of volcano that forms by alternating layers of tephra and lava.
Composite
The term given when a volcano has not erupted in recorded history.
Extinct
The temperature of rocks _____________ in depth within the earth.
Increases
Earthquakes within a massive body of water cause monstrous waves called ______________.
Tsunamis
A ____________ is created when trapped gases blast through the earth's surface.
Vent
A ______________ volcano is formed by large amounts of very fluid lava that built up gradually.
Shield
A _______________ eruption is when a volcano produces lava fountains or fire curtains.
Hawaiian
____________ is the process by which new soil is formed as rocks crumble and break into smaller pieces.
Weathering
The ____________ is the point underground where an earthquake begins.
Focus
______________ are holes or cracks which serve as escape vents for underground gases.
Fumaroles
The Hawaiian Islands were formed by his type of volcano.
Shield
A volcano that has been active at some time in recorded history, but has not had a recent eruption is referred as ______________.
Dormant
The type of weathering that occurs when natural acids slowly eat into rocks and braking it apart.
Chemical Weathering
The strength of an earthquake is referred as this.
Magnitude
What are smaller fragments of molten rock that solidify almost instantly.
Tephra
Mt. St. Helens is an example of this type of volcano.
Composite
The type of volcano's eruption that is characterized by hot clouds of gas and dust that it expels.
Plinian