Deposits that cover the earth
Sediments
What is a tectonic earthquake?
Earthquake that result from sudden movement of rock beneath the earth‘s surface
What fault occurs when rocks on one side of the fault are shoved over the rocks on the other side
Thrust fault
What causes earthquakes?
Sudden movement of rock masses along a fault
Where did the peak of Mount Saint Helens go on May 18, 1980?
Superheated gases blasted it upward and outward
Core of the Earth
Iron or nickel
Landslide, cave collapse, or an underground testing of hydrogen bomb
Tremor or weak earthquake
Molten rock is formed beneath an overlying rock layer
Domed mountains
The most active earthquake zone
Circum– Pacific belt
Name the four parts of a volcano
Vent, magma, magma chamber, and cone
Most abundant element in the earth crust?
Oxygen
What is the science of seismology?
The study of earthquakes
Two plates pushed together, causing the layers to buckle
Folded mountains
Which two states experience the fewest earthquakes
North Dakota and Florida
What is volcanology?
The study of volcanoes and volcano related phenomena
Plates that drift
Plate tectonics
elastic rebound theory
Rocks on the side of a fault spring back to the original position
When molten rock erupts from a hole in the earths crust
Volcanic mountains
What are P waves and S waves
Two kinds of waves at the focus of the earthquake
What shape can volcanoes take
Cindercone volcanoes, shield volcano
Rock that buckle upward during folding
anticline
Hypocenter
The point at which an earthquake begins
List three types of mountains
Volcanic, domed and folded mountains
What is the purpose of a seismograph
Record and study the vibrations caused by earthquakes
What are composite volcanoes?
Volcanoes that produce both cinders and lava