Shaking of the Earth caused by a sudden movement of rock beneath its surface
earthquake
One or a series of huge sea waves caused by earthquakes
tsunami
a theory created by Alfred Wegener
continental drift
formed by magma pushing through the earths crust
volcano
lava when it's underground
magma
magma above ground
lava
hottest place on earth
earths core
a risk
hazard
The layer of rock that lies between the crust and the outer core of the Earth
mantle
a destructive mudflow on the slopes of a volcano
lahar
One of the huge sections which make up the Earth's crust
plate
The place where two or more plates in the Earth's crust meet
plate boundary
The opening at the Earth's surface through which volcanic materials (lava, tephra, and gases) erupt
vent
a volcano that has recently erupted
active
the hardest part of the earths structure
crust
a mound forming on the side of a volcano
dome
the sudden occurrence of a violent discharge of steam and volcanic material
eruption
the sudden giving off of energy
discharge
consists of fragments of pulverized rock, minerals and volcanic glass, created during volcanic eruptions
ash cloud
the subject of the crossword
techtonics