Earth's Layers
How many layers are the earth divided into based on physical characteristics?
5
What initially triggered Wegener to investigate the continental drift theory?
Atlas, countries looked like puzzle pieces fit together
Boundary line where plates are coming apart
Divergent
Where two plates converge underwater is called what type of boundary?
convergent oceanic-oceanic
Which boundary line do we see some of the strongest earthquakes at?
Transform boundaries
The inner core is made of up of what chemical and physical property?
Fe, Iron
Solid
What was Wegener's background in?
Meteorology, Weather
Boundary line where the two plates are sliding past each other
Transform
The abbreviation c-c stands for what?
What type of seismic waves travel in a unilateral direction and are relatively small?
P waves (primary waves)
The physical layer of the earth that makes up the crust and tectonic plates
Lithosphere
Who were the other scientist early on who supported Wegener's theory? Why?
Botanist, could see plant fossil pattern
Name the 3 types of boundaries
convergent
divergent
transform
What boundary line is formed between a tectonic plate underwater and a land plate
The ring of fire engulfs what major plate in the ocean?
Pacific plate
The mantle is made up of which elements?
Fe, Mg, Si
What are the 3 supporting pieces of evidence of continental drift?
rock layers and formations
ancient weather doesn't align with current poles
The San Andres Fault line
Transform
Process where the crust is pushed under another plate, where it will melt until it rises again
Subduction
Which seismic waves travel perpendicular and only move through solids?
S-waves (secondary waves)
The layer of the earth that is molten lava that allows the plates to move
asthenosphere
Theory of tectonic plates
asthenosphere's upwelling motion that causes the plates to shift
convection current
Continental- continental convergent boundaries create what landforms?
Mountains
Which landforms are seen at continental-oceanic boundaries?
Trenches
Volcanic Mountain Arcs