If
the
____________________
cools
____________________
,
small
crystals
form
and
the
____________________
has
____________________
of
colour
.
Example
:
____________________
.
If
the
lava
____________________
slowly
,
then
____________________
crystals
form
and
the
rock
looks
the
same
colour
all
over
.
Example
:
basalt
.
