1
.
____________________
is
the
fourth
most
common
element
in
the
universe
2
.
Its
the
building
block
for
all
____________________
,
every
single
cell
contains
some
carbon
3
.
Carbon
is
also
found
in
:
rocks
,
seawater
,
mantle
,
air
4
.
Animals
add
carbon
dioxide
to
the
atmosphere
when
they
breathe
.
.
or
use
____________________
.
5
.
Plants
soak
up
carbon
dioxide
during
____________________
.
Storing
carbon
in
their
cells
.
6
.
Plants
are
known
as
carbon
____________________
because
they
take
more
carbon
out
than
they
add
.
7
.
The
oceans
soak
up
more
carbon
than
they
____________________
as
well
.
8
.
When
plants
and
animals
____________________
they
store
carbon
in
the
crust
.
9
.
When
humans
burn
fossil
fuels
they
release
____________________
____________________
.
10
.
When
trees
are
killed
they
no
longer
soak
up
____________________
____________________
.
11
.
Carbon
dioxide
is
a
major
contributor
to
the
____________________
effect
.
12
.
The
greenhouse
effect
is
the
____________________
of
the
earth
experiences
due
to
certain
gases
in
our
atmosphere
.
13
.
Since
the
industrial
revolution
,
carbon
in
the
earth's
atmosphere
has
increased
by
____________________
%
.
