Earthquakes and Volcanoes Flashcards
The earth is made up of:
Inner core, outer core, mantle, and crust
What is the lithosphere?
The crust and part of the mantle
What says that the Earth’s lithosphere is made up of moving plates that float on the partly melted rock?
Theory of plate tectonics
Places where the plates meet
Plate boundaries
Breaks in the earth’s surface along which rocks can move
Faults
The beginning point of an earthquake
Focus
Waves of energy sent out from the focus
Seismic waves
The point on the surface of the earth directly above the focus
Epicenter
Scientists who study the movement in the speed of P and S waves to help calculate the location of the focus of an earthquake
Seismologists
A machine used to detect, time, and measure the Earth’s movements
Seismograph
Records of the movements that seismographs produce
Seismograms
Measures the amount of destruction that an earthquake causes to manmade structures
Mercalli Scale
Measures the magnitude, or strength, of the seismic waves of an earthquake
Richter Scale
Shield volcano, cinder cone volcano, composite cone volcano
By shape
Active, dormant, extinct
By how often they erupt