Vocab
scientists use this theory to explain why the earth appears the way it does
the theory of plate tectonics
at a convergent, continental/continental plate boundary when plates collide, this forms
mountains
The outermost Layer of the Earth is called what?
The Crust
i introduced the theory of continental drift
alfred wegener
most of the United States is located on this...
the north american plate
an opening in the surface of one of earths plates through which mamga rises
volcanoes
this happens at convergent plate boundaries where one oceanic plate slides under another....
earthquakes
the layer of the earth that is a dense liquid
outer core
this is the phase that also means "all earth"
Pangea
magma that has poured out of a volcano is now called what
lava
this theory describes the idea of our continents drifting past each other
the theory of continental drift.
at a divergent plate boundary when two oceanic plates are moving away from each other, this is the result....
sea floor spreading
made of mostly iron and solid
the inner core
a break in the earths crust at fracture boundaries is also called
a fault
a steep sided depression at the top of a volcano is also called a
crater
a crater that is at least 1.6km wide is also known as what
a caldera
this is formed at divergent plate boundaries when two continental plates move away from each other
a rift valley
most of earths mass is in this....
the mantle
ground movement as it occurs is detected by what
a seismograph
duck, cover, and hold on are examples of what
things you should do during an earthquake
magma trapped in the lithosphere can heat underground water and in some places the steam spews from the crust creating a what
a geyser
the san andres fault is an example of this type of plate boundary
transform
i make up the earths crust and upper mantle...
the lithosphere
the force that moves the earths plates
convection currents
most major earthquakes in the united states happen in california and alaska because
these states are located on a plate boundary