Ch. 5 Ls/ 1&2 Flashcards
Shield volcano
Lava flows freely and spreads out widely
Composite volcano
Shoot out lava in rock fragments in forms a towering
mountain
Cinder cone volcano
Breaks into pieces cools and forms cinders around the vent
Earthquake
The rolling, shaking, moving or shocking of the earths surface
Hypocenter
Location on the fault where the movement first occurs
Seismic waves
The source of an earthquake create seismic waves that travel outward.
Tectonic plates Are constantly moving and the strain along that fault becomes too much. The energy is rapidly released in the form of vibrations called seismic waves.
Normal fault
When rocks pulls apart one side slips downward
Reverse fault
The rocks push together, one side shifts up over the other, creating a reverse fault.
Strike slip fault
When rocks slide past each other in opposite directions, a lateral or transform fault is created.
Seismograph
A tool that graphs seismic waves. Is used to measure the direction, speed, and magnitude of earthquakes.
Magna
When the heat inside the earth causes the rocks to melt,
a thick liquid called magna forms.
Magna rises to the surface and pushes through weak spots.
Ring of fire
The edges around the plates of the Pacific ocean are subject to the most movement, and the most volcanoes and earthquakes
Tectonic plates
The Earth’s crust consists of rocky plates that fit together like puzzle pieces. They are constantly moving
Mount Vesovius
Volcano. Naples, Italy A.D. 79. Destroyed Pompeii
Mount Saint Helens
Volcano. 1800 & 1980 Washington US