Happy Chemical Halloween Vegas Bajas Montijo

Pepi Jaramillo Romero
Dpto. Física y Química
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How does it work?
Foam is awesome! The foam you made is special because each tiny
foam bubble is filled with oxygen. The yeast acted as a catalyst (a
helper) to remove the oxygen from the hydrogen peroxide. Since it did
this very fast, it created lots and lots of bubbles. Did you notice the
bottle got warm. Your experiment created a reaction called an
Exothermic Reaction – that means it not only created foam, it created
heat! The foam produced is just water, soap, and oxygen so you can
clean it up with a sponge and pour any extra liquid left in the bottle
down the drain.
This experiment is sometimes called “Elephant’s Toothpaste” because it
looks like toothpaste coming out of a tube, but don’t get the foam in
your mouth!
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FANTASTIC FOAMY FOUNTAIN

You will need
A clean 16 ounce plastic soda bottle
1/2 cup 20-volume hydrogen peroxide liquid (20-volume is a 6%
solution, ask an adult to get this from a beauty supply store or hair
salon)
1 Tablespoon (one packet) of dry yeast
3 Tablespoons of warm water
Liquid dish washing soap
Food coloring
Small cup
• Safety goggles
NOTE: The foam will overflow from the bottle, so be sure to do this
experiment on a washable surface, or place the bottle on a tray.
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What to do
Pour the water into the bottle.
Use a measuring cup or funnel to slowly pour the vegetable oil
into the bottle until it’s almost full. You may have to wait a few
minutes for the oil and water separate.
Add 10 drops of food colouring to the bottle (we like red, but any
colour will look great.) The drops will pass through the oil and
then mix with the water below.
Break a fizzing tablet in half and drop the half tablet into the
bottle. Watch it sink to the bottom and let the blobby greatness
begin!
To keep the effect going, just add another tablet piece. For a true
lava lamp effect, shine a flashlight through the bottom of the
bottle.
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MAKE IT AN EXPERIMENT
The project above is a DEMONSTRATION. To make it a true
experiment, you can try to answer these questions:
Does the amount of yeast change the amount of foam
produced?
Does the experiment work as well if you add the dry yeast
without mixing it with water?
Does the size of the bottle affect the amount of foam
produced?
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VIDEO FANTASTIC FOAMY FOUNTAIN

HOW TO MAKE A SLIME
How does it work?
Now for the SCIENCE part….
This POLYMER is unique
because it has qualities 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 tight 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.
Jell-O, rubber bands, plastic soda bottles, sneaker soles, even gum are all forms of
polymers. The polymer you made should be kept in a sealed plastic bag when you aren’t
playing with it. Also, be sure to keep it away from young kids or pets who might think it’s
food. Have fun!
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HOW TO MAKE A SLIME
You will need
Elmer’s glue
2 disposable cups
Food coloring
Borax Powder
A plastic spoon (for stirring)
A tablespoon (for measuring)
What to do
Fill one small cup with water and add a spoonful of the Borax powder and stir it up.
Then set it aside.
Fill the other small cup with about 1 inch (2.5 cm) of the glue.
Add three tablespoons (20 ml) of water to the glue and stir.
Add a few drops of the food coloring and stir it up until mixed.
Now the fun part…Add one tablespoons of the Borax solution you made earlier and stir
well. Watch the slime form!
After the slime forms let it sit for about 30 seconds and then pull it off the spoon and play
with it!
Tip: Keep your slime in a tightly closed plastic bag when you are not playing with it, and
keep it away from carpet and your little sister’s hair.
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HOW TO MAKE A SLIME
We made a DEMONSTRATION. To make it a true experiment, you can try
to answer these questions:
How can you make the polymer stretch the farthest?
Does the amount of Borax added change the slime?
What method of storage will make the polymer last the longest?
What brand of glue makes the stretchiest polymer?
Does the amount of water added to the glue affect the gooeyness of the
slime?
VIDEO HOW TO MAKE A SLIME
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How does it work?
The baking soda and the vinegar create an ACID-BASE
reaction and the two chemicals work together to
create a gas, (carbon dioxide) Gasses need a lot of
room to spread out and the carbon dioxide starts to
fill the bottle, and then moves into the balloon to
inflate it.
BUILD A FIZZ INFLATOR
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You will need
One small empty plastic soda or water bottle
1/2 cup of vinegar
Small balloon
Baking soda
Funnel or piece of paper
What to do
Carefully pour the vinegar into the bottle.
This is the tricky part: Loosen up the balloon by stretching it a few times and then use
the funnel to fill it a bit more than half way with baking soda. If you don’t have a
funnel you can make one using the paper and some tape.
Now carefully put the neck of the balloon all the way over the neck of the bottle
without letting any baking soda into the bottle.
Ready? Lift the balloon up so that the baking soda falls from the balloon into the
bottle and mixes with the vinegar. Watch the fizz-inflator at work!
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We made a DEMONSTRATION. To make it a true experiment, you can try to
answer these questions:
Does the size of the bottle affect how much the balloon fills?
Can the amount the balloon fills-up be controlled by the amount of vinegar or
baking soda?
VIDEO BUILD A FIZZ INFLATOR
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How does it work?
When expanded polystyrene is placed in propanone
(acetone), the polystyrene apparently disappears, and
the gas bubbles within the material create a fizzing
effect as they are released. A small volume of
propanone can absorb an impressive volume of
expanded polystyrene.
DISAPPEARING PLASTIC!
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You will need
Propanone (acetone), (HIGHLY FLAMMABLE, IRRITANT), 50 cm3
Expanded polystyrene pieces, large quantity
Eye protection
Supply of paper towels, newspaper or similar
Beaker, 1 dm3
Large transparent container
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What to do
Hold an expanded polystyrene drinking cup over the 1 dm3 beaker and slowly pour
about 50 cm3 of propanone into it. The bottom will fall out of the cup and the
propanone will pour straight through into the beaker.
Alternatively, simply pour about 50 cm3 of propanone directly into the 1 dm3 beaker.
Add about 5 dm3 of expanded polystyrene pieces to the large transparent container.
Add the expanded polystyrene pieces a handful at a time to the propanone. A
suitable scoop may be useful for this. The polystyrene pieces will shrink and fizz,
eventually forming a layer of sticky gel below the propanone.
VIDEO DISAPPEARING PLASTIC!
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OOBLECK – THE CORNSTARCH
AND WATER EXPERIMENT
How does it work?
Our cornstarch goo (sometimes referred to as “oobleck” from the Dr. Suess book) is what
scientists call a “Non-Newtonian” liquid. Basically, Sir Isaac Newton stated individual
liquids flow at consistent, predictable rates. As you likely discovered, cornstarch goo
does NOT follow those rules – it can act almost like a solid, and them flow like a liquid.
Technically speaking, the goo is a SUSPENSION, meaning that the grains of starch are not
dissolved, they are just suspended and spread out in the water. If you let the goo sit for
an while, the cornstarch would settle to the bottom of the bowl.
So why does this concoction act the way it does? Most of it has to do with pressure. The
size, shape, and makeup of the cornstarch grains causes the cornstarch to “lock-up” and
hold its shape when pressure is applied to it. People have filled small pools with oobleck
and they are able to walk across the surface of it (as long as they move quickly.) As soon
as they stop walking, they begin to sink.
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OOBLECK – THE CORNSTARCH
AND WATER EXPERIMENT
You will need:
Cornstarch (a 16 oz. box is good for every 2-3 participants – but more is always better)
Water
Food coloring (we always say it’s optional, but it does make it more fun – don’t use too
much or you could end up with colored hands…and clothes…and curtains)
A large bowl
I hope you get to try this out.
VIDEO I OOBLECK-THE CORNDTARCH AND WATER
EXPERIMENT
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VIDEO II OOBLECK-THE CORNDTARCH AND WATER
EXPERIMENT

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How does it work?
To begin, the oil stays above the water because the oil is less dense
than water. The oil and water do not mix because of something called
“intermolecular polarity.” That term is fun to bring up in dinner
conversation. Molecular polarity basically means that water molecules
are attracted to other water molecules. They get along fine, and can
loosely bond together (drops.) This is similar to magnets that are
attracted to each other. Oil molecules are attracted to other oil
molecules, they get along fine as well. But the structures of the two
molecules do not allow them to bond together.
When you added the tablet piece, it sank to the bottom and started
dissolving and creating a gas. As the gas bubbles rose, they took some
of the colored water with them. When the blob of water reached the
top, the gas escaped and down went the water. Cool, huh? By the way,
you can store your “Blobs In A Bottle” with the cap on, and then
anytime you want to bring it back to life, just add another tablet piece.
BLOBS IN A BOTTLE

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BLOBS IN A BOTTLE
You will need
A clean 1 litre clear soda bottle
3/4 cup of water
Vegetable Oil
Fizzing tablets
Food colouring
What to do
Pour the water into the bottle.
Use a measuring cup or funnel to slowly pour the vegetable oil into the
bottle until it’s almost full. You may have to wait a few minutes for the
oil and water separate.
Add 10 drops of food colouring to the bottle (we like red, but any
colour will look great.) The drops will pass through the oil and then mix
with the water below.
Break a fizzing tablet in half and drop the half tablet into the bottle.
Watch it sink to the bottom and let the blobby greatness begin!
To keep the effect going, just add another tablet piece. For a true lava
lamp effect, shine a flashlight through the bottom of the bottle.

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BLOBS IN A BOTTLE
We made a DEMONSTRATION. To make it a true experiment,
you can try to answer these questions:
Does the temperature of the water affect the reaction?
Does the size of the bottle affect how many blobs are
produced?
Does the effect still work if the cap is put on the bottle?
Does the size of the tablet pieces affect the number of blobs
created?
VIDEO BLOBS IN A BOTTLE

BIBLIOGRAPHY
https://sciencebob.com
You get home, tired after a long day’s work and
ready for a relaxing night alone. You reach for the
light switch, but my hand is already there.
Good night!
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Happy Chemical Halloween Vegas Bajas Montijo

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Happy Chemical Halloween Vegas Bajas Montijo