layers of the earth
plate boundaries
volcanoes
100

what is the thickest layer of the earth 

mantel 

100

how many ways can tectonic plates move 

3

100

what is the difference between lava and magma 

lava is the magma that reaches the surface of the earth magma is the lava before it reaches the surface

200

what is the thinnest layer of the earth

crust 

200

what is the name of the movement that causes volcanoes or mountains 

convergent 

200

how do volcanoes form

 magma from within the upper mantle works its way to the surface. then it erupts to form lava flows and ash . Over time it will get bigger and bigger

300

how many layers of the earth are there 

4

300

what is the name of the movement that causes rift valleys, volcanoes, and shallow earthquakes

divergent 

300

what is a seismic wave 

earthquake wave 

400

what is the name of the movement that causes lots of earthquakes

transform 

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