Earthquake
Where seismic waves originate and rocks first move along the fault
Focus of an earthquake
What is tiny particles of volcanic rock or glass?
Volcanic Ash
Two plates pushing together until one buckles or folds over
Reverse Fault
Fast-moving waves that occur under the surface of the earth.
Body Waves
An avalanche like emission of red-hot dust and gases
Pyroclastic flow
What is location on earths surface directly above an earthquakes focus?
Epicenter
The opening at the top of the Volcano
Crater
Plate boundaries that move horizontally past each other
Strike-slip
The strength of a seismic wave
Magnitude
Kilauea in Hawaii is the world's most what type of Volcano?
Active
The idea that the earth's crust is made up of moving plates
Theory of Plate Tectonics
When part of the mountain collapses causing mud and rock fragments to surge down the mountain
Debris Flow
Plate boundaries move apart forming a gap
Normal
Slower more destructive waves on the surface of the earth
Surface Waves
A small, steep-sided volcano that erupts gas-rich, basaltic lava.
Cinder Cone
Magnitude can be measured by what instrument?
Richter scale
Magma that breaks through to the surface is called what?
Lava
Breaks in the earth's surface along which rock can move
Faults
What is Energy that travels as vibration and in the earth?
Seismic Waves
A large steep-sided volcano with explosive eruptions along convergent boundaries.
Composite Cone Volcano
Three causes of earthquakes
1. Buildup and release of energy when two surface plates move against each other. 2. Large amounts of earth removed or added. 3. Molten rock moves under a volcano
Molton rock that pools under the volcano
Magma Chamber
What is the name of the single landmass that is thought to have existed at one time?
Pangaea
A scientist that measures earthquakes?
Seismologist
A large volcano with gentle slopes of basaltic lava. common at divergent boundaries.
Shield Volcano