The
interior
of
the
Earth
is
hot
due
to
____________________
reasons
.
First
,
the
Earth
is
____________________
from
when
it
formed
.
The
Earth
is
not
____________________
from
the
heat
generated
from
when
the
Earth
formed
.
There
are
____________________
reasons
that
help
explain
this
.
First
,
reason
for
why
the
interior
of
Earth
is
hot
.
One
reason
is
that
when
the
Earth
was
forming
____________________
occurred
between
the
planetesimals
and
asteroids
and
Earth
.
Whenever
Earth
was
struck
by
an
asteroid
or
planetesimal
____________________
from
the
impact
was
generated
.
Another
reason
is
that
____________________
heat
was
generated
when
the
Earth
was
molten
(
melted
)
.
As
the
iron
,
nickel
,
and
other
dense
materials
sunk
to
the
____________________
,
basalt
and
other
materials
sunk
to
the
____________________
,
and
granite
and
other
less
dense
materials
____________________
to
the
crust
they
ran
into
one
another
creating
friction
.
Much
like
putting
your
hands
together
and
moving
them
back
-
and
-
forth
across
each
other
friction
causes
heat
to
be
generated
.
The
impacts
____________________
heat
today
,
but
they
are
cooling
off
from
when
the
heat
was
generated
.
The
second
reason
why
Earth's
interior
is
hot
is
because
of
the
core
being
____________________
.
The
core
not
only
contains
iron
,
but
it
also
contains
other
items
like
____________________
.
This
causes
the
core
to
release
heat
.
Even
today
,
the
core
still
____________________
heat
due
to
this
.
The
final
reason
why
the
Earth's
interior
is
hot
is
because
of
____________________
.
This
causes
the
____________________
amount
of
heat
to
be
generated
,
but
it
does
generate
some
heat
.
The
deeper
into
the
Earth's
interior
you
go
the
____________________
the
pressure
.
As
the
pressure
increases
the
temperature
increases
.
This
does
not
cause
a
huge
difference
in
temperature
,
but
it
does
increase
the
temperature
.
