Boundaries
What are the three types of boundaries?
Convergent, Divergent, Transform Boundaries
When was this theory SOLIDIFIED (not created)?
1960s
What are natural disasters caused by plate tectonics?
Volcanoes, Earthquakes, Tsunamis
What is an earthquake?
A violent shaking of the earths surface
What is the Super continent?
Another name for Pangaea
What is divergent boundary?
plates that move away from each other
What is the theory of plate tectonics?
How plates move, interact and change
define Convection Currents
warm material expands and rises while cool material contracts and falls
What is the difference between a P-wave and S-wave?
P-waves move faster than S-waves
Viscosity
a substance's resistance to flow
What is Convergent boundary?
Moves towards each other
What is a subduction zone?
When an oceanic plate and continental plate collide.
What is the core?
the hottest part of the earth (a hot ball in the center of the earth)
What are volcanoes?
Openings in the earths crust where lava, gas and ash come from
Epicenter
location on the surface directly above the focus
What is transform boundary?
when plates slide past each other
What is another name for lithosphere?
Crust
What are convection currents and where do they occur?
Helps transfer internal heat outward, occurs in the mantle
Where are volcanoes?
found on the edges of the continents
Alfred Wegener
discovered plate tectonics
What are the three effects of convergent boundaries?
Mountains, earthquakes, and volcanoes are the effects of this boundary
How many tectonic plates are there?
7
What are the 3 causes of plate movement?
The forces that drive Plate Tectonics include:
What is a hot spot?
A column of extremely hot mantle rock
Composite Cone , Shield Cone , Cinder Cone
largest and most violent volcano
small and flat
steepest slope