Vocabulary
Earth's outermost layer of Rock
What is Earth's crust?
Vibrations of the earth that results either from volcanic activity or rock masses suddenly moving along a fault
What is an earthquake?
This discontinuity separates the mantle from the crust
What is the Moho?
The place the magnetic field is believed to be generated
What is the Earth's core?
Many scientists think that at one time, all the continents might have fit together to form this supercontinent
What is Pangaea?
Small, solid fragments of rock and other material s that are carried and deposited by wind, water , or ice
What is sediment?
The boundary between two sections of rock that can move relative to one another
What is a fault?
The layer of earth directly beneath the crust
What is the mantle?
Scientists generally agree that this causes the earth's magnetic field
What is electrical flow in the core?
The scale used to measure earthquakes
What is the Richter Scale?
Rock formed when chemical reactions cement sediments together,, hardening them
What is sedimentary rock?
The point where an earthquake begins
What is the focus?
What is the inner core?
One major benefit we derive from the earth’s magnetic field is that it blocks these
What are cosmic rays?
If an earthquake is rated 5 on a the Richter Scale and its aftershock was rated a 4, how many times greater the earthquake is compared to the aftershock
What is 32?
Rock that forms from molten rock
What is Igneous rock?
The point on the surface of the earth directly above an earthquakes focus.
What is the epicenter?
The inner core is solid because of this
What is pressure freezing?
What are the dynamo theory and the rapid-decay theory?
The study of earthquakes
What is seismology?
Igneous or sedimentary rock that has been changed into a new kind of rock as a result of great pressure and temperature
What is Metamorphic Rock?
rock that behaves something like a liquid and a solid
What is plastic rock?
The earth's core is believed to be made primarily of this element
What is iron?
Of the dynamo and rapid-decay theories, the one that is the most scientificlly valid
What is rapid decay?
Theory that explains earthquakes, where rock masses act a bit like rubber bands
What is elastic rebound theory?