In
order
to
demonstrate
or
reject
____________________
,
procedures
called
experiments
are
carried
out
.
Variables
are
____________________
characteristics
of
an
object
or
situation
.
____________________
variables
do
not
take
numerical
values
.
For
example
,
a
measurement
of
this
type
regarding
the
temperature
of
an
object
is
"
Hot
"
or
"
Cold
"
.
____________________
variables
take
values
?
?
in
numerical
scales
.
For
example
,
this
object
is
at
a
temperature
of
10
degrees
Celsius
.
Independent
variables
are
those
whose
value
does
not
____________________
on
another
variable
.
For
example
,
the
taste
of
a
cookie
does
not
depend
on
its
size
.
Dependent
variables
are
those
whose
value
depends
on
changing
the
value
of
another
variable
.
For
example
,
the
taste
of
a
cookie
depends
on
the
amount
of
sugar
it
contains
.
A
"
____________________
Variable
"
is
one
that
is
kept
constant
so
it
does
not
affect
the
experiment
.
During
an
experiment
the
researcher
____________________
an
independent
variable
and
measures
the
result
in
a
dependent
variable
.
An
____________________
group
is
one
where
the
researcher
has
manipulated
a
variable
to
observe
its
impact
.
A
control
____________________
is
one
in
which
the
researcher
has
left
all
the
variables
constant
.
It
serves
to
make
a
comparison
with
the
experimental
group
.
