____________________
is
the
amount
of
matter
in
an
object
.
Weight
is
gravity's
pull
on
an
object
.
Gravity
is
the
pull
objects
have
on
each
other
.
The
____________________
table
is
a
chart
of
all
the
known
elements
.
Atoms
are
the
smallest
particle
of
an
element
.
Matter
can't
be
created
or
destroyed
.
It
just
changes
form
.
If
you
increase
____________________
,
particle
motion
increases
.
Protons
have
a
positive
charge
.
Electrons
have
a
negative
charge
.
A
____________________
is
a
curved
,
transparent
material
that
refracts
light
in
a
particular
way
.
When
forces
are
____________________
,
there
is
no
change
in
motion
.
