Slime

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A science Experiment to explore polymers creating slime

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  • http://acs.chem.ku.edu/Carnival2001/Activities/Slime/default.asp

    check out this site for an explanation of the chemistry. I am a Biology teacher and created this as an example for other teachers at my school to see a use for slideshare. Only problem now is slideshare doesn't work on my school network
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  • <number>
  • Slime

    1. 1. Exploring
Polymers
 A
polymer
is
a
large
molecule
 (macromolecule)
made
up
of
 repea3ng
structural
units
 typically
connected
by
 covalent
chemical
bonds.
 When you seen this pen it indicates a 0me for you to  write down different informa0on about this ac0vity.  This informa0on will be needed for you to complete an  experiment report about making slime 
    2. 2. Making
Slime
 Making
Slime
is
a
demonstra<on
of
how
certain
polymers
 are
effected
by
other
chemicals,
such
as
'cross‐linkers’.
 Polymers
are
used
in
nearly
everything
these
days,
such
as
 most
kinds
of
plas<cs,
nylon,
and
clothes.

 We
are
going
to
use
a
borax
solu3on
(sodium
tetraborate)
 as
an
example
of
a
'cross‐linking'
substance
that
connects
 the
polymer
chains
together
.
 (using
a
PVA
glue
as
our
Polymer)
 Write a Hypothesis based on the above  informa0on before you con0nue   Use the words in bold in your Hypothesis 
    3. 3. SAFETY
FIRST
 •  Not
to
be
fed
to
your
pet
 



or
baby
brother.

 •  Not
good
for
leaving
in
carpets
or

 




on
furniture
overnight.

 •  To
keep
almost
indefinitely,

 



leave
in
zip‐loc
bag
in
refrigerator




 •  Not
a
bad
idea
to
wash
hands
before

 



(so
it
doesn't
grow
mold)
and

 



AKer
(so
mum
will
let
you
eat
dinner)


    4. 4. Collect
the
following
materials
 

























3
teaspoons
10%
polyvinyl
alcohol

 

























2
tablespoons
of
Borax
(sodium
tetraborate)

 

























Water
 

























Ziploc®
or
other
sealable
plas<c
bags

 

























CraK
s<cks
(icy‐pole
s<cks)
 

























A
jar

 

























A
disposal
cup
to
mix
all
the
ingredients
 

























Food
colouring
 Write a descrip0on of what the Glue and  Borax look like. Include whether it is a  Liquid or a Powder and the colour is it  
    5. 5. How
to
do
it
 1.  In the cup, mix an equal quantity of glue and water. 2.  Add a few drops of food colouring. 3.  Mix well with a icy-pole stick. Write down a description of your new solution.
 4.  In the jar combine a tablespoon of borax powder with a cup (250ml) of water - make a saturated solution of borax. 5.  Screw on the lid of the jar tightly and shake the mixture well. 6.  If all of the borax powder dissolves, then you need to add a bit more. When you get to the point where no more borax will dissolve the solution is saturated. Write down a description of your new solution.
 7.  Now, add about two tablespoons of the borax solution to the cup with the glue and water mixture and stir quickly. 8.  The resulting mixture should be slimy or gooey not sticky
    6. 6. When
you
have
finished
exploring
 •  You
can
save
your
slime
for
a
long
<me
by
 puXng
the
'stuff'
into
sealable
plas<c
bags.

 •  Dispose,
Clean
and
Return
all
equipment
 Note:
 •  If
your
slime
dries
out,
you
can
add
a
bit
of
 water
back
into
it.

 •  If
it
gets
too
dry,
you'll
have
to
start
over.

 Write a descrip0on of what the slime  looks  and feels like  
    7. 7. Now
for
the
SCIENCE
part....

 This
POLYMER
is
unique
because
it
has
quali<es
of
both
a
solid
 and
a
liquid.
It
can
take
the
shape
of
its
containers
like
a
liquid
 does,
yet
you
can
hold
it
in
your
hand
and
pick
it
up
like
a
solid.

 As
you
might
know,
solid
molecules
are
<ght
together,
liquid
 molecules
spread
out
and
break
apart
(drops)
POLYMER
 molecules
CHAIN
themselves
together
(they
can
stretch
and
 bend
like
chains)
and
that
makes
them
special.

 The
polymer
you
made
should
be
kept
in
a
sealed
plas<c
bag
 when
you
aren’t
playing
with
it.

 Reflect on your hypothesis and the informa0on  about polymers to write a conclusion about  making slime.  

    ×