a sudden, loud accident involving vehicles
crash
to become hard or harder
harden
the powdery residue left after burning
ash
strength or energy used to move something
force
very large in size
enormous
in a sudden and violent way
explosively
to burst out suddenly, often referring to a volcano
erupt
a narrow opening or break in something
crack
the outer layer of the earth
crust
raised up
uplifted
to walk a long distance, especially in nature
hike
to understand or solve something
figure out
a group of connected mountains
mountain range
hot, liquid rock beneath the earth's surface
magma
made liquid by heat
molten
