Kanchana lab report

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Kanchana lab report

  1. 1. Name:
Kanchana
Jaishankar
 GROUP:
Yuan
Yuan,
Sally Title:

Factors
that
affect
the
cooling
rate
of
water A.

Aim
(What
do
you
want
to
find
out?) How
the
amount
of
water
could
affect
the
rate
of
cooling
water. B.

Hypothesis
(What
do
you
think
will
happen?) If
i
boil
100
ml
of
water,
then
it’s
cooling
rate
will
be
faster
then
the
cooling
rater
of
30o
ml
and
500
ml.
I
 think
that
500
ml
will
have
a
slower
cooling
rate
then
300
ml. 
 
 What
is
the
scienNfic
reason
for
your
hypothesis? 












1)
Due
to
diffusion.
It
will
take
longer
to
diffuse
amongst

bigger
amounts. C.
Variables i. Input
variable 



























Amount
of
water,
Surface
area
of
the
opening
of

container,
starEng
temperature
of


 



























water. 
 
 How
will
you
change
it?
 



























 




























I
will
change
it
by
either
dropping
or
increasing
the
amount
of
water
in
the
container. ii. Output
variable:
 Time
to
cool,
Temperature
of
water How
will
you
measure
it?
 I
will
measure
it
by
using
a
stopwatch
(
to
keep
track
of
Eme),
A
thermometer
(to
know
 then
the
water
reaches
room
temperature). iii. Control
variable
1:
What
is
it?
How
will
I
keep
it
the
same? IniEal
Room
Temperature.

I
will
keep
it
constant
by
measuring
and
recording
the
 temperature
before
I
start
heaEng
the
water. 
 iv. Control
variable
2:
What
is
it?
How
will
I
keep
it
the
same? Surface
area
of
water.
I
will
keep
it
constant
by
not
changing
the
type
of
beaker.
  2. 2. v. Control
variable
3:
What
is
it?
How
will
I
keep
it
the
same? 




























Materials
of
beaker.
I
will
keep
it
constant
by
using
the
same
type
of
beaker.
 D.

Materials 1. 3x
500
ml
Beaker 2. 3
Bunsen
Burner 3. 3
Heat
Proof
Mat 4. 3
Gauze
Mat 5. 2
x
Thermometer 6. 3
x
Tripod 7. 3
x
Retort
STand 8. 3
x
Clamp 9. 3
x
Boss
head 10. 1
x
Measuring
Cylinder 11. 1
x
Ignitor E.

Method 1. 
Wear
your
Safety
Equipment 2. 
Ignite
the
Bunsen
Burner 3. 
Start
Boiling
the
water 4. 
Boil
unEl
it
reaches
60
˚C 5. Stop
Burner 6. Wait
For
water
to
cool 7. Record
date
Per
Minute
  3. 3. 



F.

Data
Table Minutes 500 ml 300ml 100ml 1 59 60 58 2 58.5 59 56 3 58 57 54 4 57 56 52 5 56.5 55.5 50 6 55.5 55 48 7 55 54 46 8 54 52.5 45 9 54 52 44 10 54 51 42 
G.

Graph Blue
‐
300ml RED‐
500
ml

 Yellow‐
100
ml
  4. 4. 




































GRAPH
 60 T 40 e m p r a 30 t u r e 20 10 









1














2














3















4



















5





















6



















7














8










9












10 Minute
  5. 5. H.

Conclusion i. 
Was
your
hypothesis
correct?
 













Yes,
My
hypothesis
was
correct.
According
to
my
data,
the
100
ml

dropped
lower
than
 300
or
500
ml
and
500
indeed
did
take
the
maximum
amount
of
Eme
to
cool
down.

I
think
that
 my
hypothesis
was
preYy
easy
to
guess
and
so
is
my
most
accurate
hypothesis
Ell
date. ii. 
Why
or
why
not?

ScienNfic
Reason? My
hypothesis
was
correct
because
of
my
scienEfic
reason.

Because
of
Diffusion.
The
 more
amount
of
water,
The
more
Eme
it
takes
to
heat.
And
even
more
Eme
to
cool.
It
 will
actually
be
a
while
Ell
it
cools
down
and
reaches
iniEal
room
temperature. 
 
 Iv.
 Do
you
trust
your
data?
Why? 












I
don’t
trust
my
data
completely.
Because
I
was
constantly
distracted,
I
someEmes
mearured
the
 Eme
five
to
ten
seconds
a[er
the
minute
passed. I.

EvaluaNon i. 
Name
two
errors
in
your
experiment: 
 a)
When
we
first
did
our
experiment,
We
graphed
out
data
wrong.

And
so,
we
had
 to
change
quanEEes
and
Eme
limits
so
that
we
can
complete
our
work
on
Eme.
We
 had
to
alter
the
quanEty
of
water
and
the
boiling
point
to
60˚C.

  6. 6. b)
We
actually
ended
up
conducEng
the
experiment
two
Emes.
The
second
Eme
we
 conducted
the
experiment,
We

ended
up
creaEng
many
improvisaEons.
This
may
 have
affected
out
results. ii. Name
two
improvements
you
could
make: a)
At
either
some
point
of
Eme,
We
either
didn’t
co‐operate
with
each
other
or
had
 the
idea
communicated
throughout
the
group
wrong.

And
so
I
think
that
the
 experiment
may
have
been
a
much
more
successful
if
the
team
would
have
co‐ operated
a
bit
more. b)

I
also
think
that
we
could
have
improved
by
paying
more
aYenEon
during
the
 experiment.
I
always

got
carried
away
and
distracted
by
my
friends
or
my
 homework
from
other
classes..
If
I
was
exact
in
my
recordings,
Then
I
would
have
 probably
ended
up
with
a
beYer
and
more
accurate
result. iii
 Other
invesNgaNons
you
could
do
could
do
which
are
similar: A) The
amount
of
Nme
it
takes
to
melt
ice. B)

×