The solid, outer layer of earth that consists of the crust and the rigid part of the upper mantle
The soft, elastic layer of mantle on which plates move-partially melted layer
Tectonic plates/lithospheric plates
Rigid, but MOVING pieces of the earth's crust
Theory of the formation and movement of plates that cover the earth's surface
Theory that all continents are pieces of Pangaea that have now drifted apart
The "super continent", the belief that all continents were once connected creating a huge land mass
Scientific study of earthquakes
The result of two plates rubbing together or making contact in some way
Forms when 2 plates SLIDE past each other
Forms when 2 plates move apart
Forms when 2 plates come together
Primary waves (P waves)
Waves that can travel through solids, liquids, and gases. These are the first waves released during an earthquake.
Secondary waves (S waves)
Waves that cannot travel through liquid. Released once rocks have been deformed from side to side.
Waves that travel along the earth's surface. These waves move the slowest and are the most destructive.
The point on the earth's surface directly above an earthquake's starting point-the focus.