Boundaries
What are the 3 types of plate boundaries?
convergent, divergent, and transform?
What is the theory that all plates started as one huge continent?
Pangaea
What layer of the Earth is the thickest?
mantle
When two continental plates converge, what landform is created?
mountains or volcano
What is a tsunami formed by?
an earthquake
What happens at a divergent boundary?
plates move away from each other
How fast do tectonic plates move?
3-5 cm per year
What layer of the earth makes up the tectonic plates?
lithosphere
When two oceanic plates diverge, what is the result?
Mid-oceanic ridge
what is an aftershock?
a release of the last amount of energy stored from an earthquake
What happens at a convergent boundary?
plates move towards each other
What plate do we live on?
The North American plate
How many layers are there?
5: inner core, outer core, upper mantle, lower mantle, crust
What boundaries cause earthquakes to occur?
convergent and transform
What does litho mean?
rock
When plates slide past each other, what type of boundary is this?
transform
What are the two types of tectonic plates?
oceanic and continental
What layer of the earth are the convection currents in, that cause tectonic plates to move?
What boundary can create new crust?
divergent
The lithosphere is divided into several pieces and those pieces slowly slide over the asthenosphere, who's theory is this?
alfred wegner
What type of boundary creates a subduction zone?
convergent
What are tectonic plates made of?
solid rock, generally composed of both continental and oceanic lithosphere
What two metals are found in the outer core?
iron and nickel
San Andreas fault is due to what type of boundary?
transform
What percentage of volcanoes are located in the Ring of Fire?
75%