one empty 35mm plastic film canister and lid

8/8/2019 One Empty 35mm Plastic Film Canister and Lid

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y One empty 35mm plastic film canister and lid (visit any store that has film developing andthey will usually give you some of these for free. The white canisters work much better

than the black ones do.)y One fizzing antacid tablet (such as Alka-Seltzer - Get this from your parents)y Watery Safety goggles

1. Put on those safety goggles and head outside. No really, when this works, that film canister

really flies! If you want to try the indoor version, do not turn the canister upside down in step 5.

2. Break the antacid tablet in half.

3. Remove the lid from the film canister and put a teaspoon (5 ml) of water into the canister.

Do the next 2 steps quickly

4. Drop the tablet half into the canister and snap the cap onto the canister (make sure that it snapson tightly.)

5. Quickly put the canister on the ground CAP SIDE DOWN and STEP BACKat least 2meters.

6. About 10 seconds later, you will hear a POP! and the film canister will launch into the air!


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Caution: If it does not launch, wait at least 30 second before examining the canister. Usually thecap is not on tight enough and the build of of gas leaked out.

There's nothing like a little rocket science to add some excitement to the day. When you add the

water it starts to dissolve the alka-seltzer tablet. This creates a gas call carbon dioxide. As thecarbon dioxide is being released, it creates pressure inside the film canister. The more gas that is

made, the more pressure builds up until the cap it blasted down and the rocket is blasted up. Thissystem of thrust is how a real rocket works whether it is in outer space or here in the earth's

atmosphere. Of course, real rockets use rocket fuel. You can experiment controlling the rocket'spath by adding fins and a nose cone that you can make out of paper. If you like this experiment,

try the Exploding Lunch Bag. Be safe and have fun!

CHICKEN SOUNDS FROM A CUP!

* A plastic drinking cup

* Yarn or cotton string (nylonstring will not work well)

* 1 paper clip* Paper towel

* A nail* Scissors

*Water

1. Cut a piece of yarn about 20 inches (40 cm) long.2. Ask an adult to use the nail to carefully punch a hold in the centerof the bottom of the cup.3. Tie one end of the yarn to the middle of the paper clip.4. Push the other end of the yarn through the hole in the cup and pull it

through as shown in the picture.

5. Get a piece of paper towel about the size of a dollar bill, then fold it once and get it dampin the water.


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6. Now it's time to make some noise! Hold the cup firmly in one hand, and wrap the damppaper towel around the string near the cup. While you squeeze the string, pull down in

short jerks so that the paper towel tightly slides along the string. If all goes well - youhear a chicken!

This is an example of how a sounding board works. The vibrations from the string would be

almost silent without the cup, but when you add the cup, it spreads the vibrations and amplifiesthem (makes them louder.) Pianos and music boxes use wood to act as a sounding board to make

the instrument louder.

y A volcano - Talk to an art teacher about making a volcanoout of paper mache or plaster. You can also use clay or ifyou're in a hurry to make your volcano, use a mound of dirtoutside.

y A container that 35mm film comes in or similar sizecontainer.

y Red and yellow food coloring (optional)y Vinegary Liquid dish washing soap

1. Go outside or prepare for some clean-up inside2. Put the container into the volcano at the top3. Add two spoonfuls of baking soda4. Add about a spoonful of dish soap


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5. Add about 5 drops each of the red and yellow food coloringNow for the eruption!:

6. Add about an ounce of the vinegar into the container and watch what your volcano comealive.

A VOLCANO is produced over thousands of years as heat a pressure build up. That aspect of avolcano is very difficult to recreate in a home experiment. However this volcano will give you an

idea of what it might look like when a volcano erupts flowing lava. This is a classic experimentin which a CHEMICAL reaction can create the appearance of a PHYSICAL volcano eruption.

You should look at pictures of volcanoes to be familiar with the different types. (A SHIELDvolcano, for example is the most common kind of volcano, and yet few people know about them)

The reaction will bubble up and flow down the side like a real volcano (only much faster!) Lookfor videos of volcanoes erupting and be sure that you understand how heat and pressure work to

really make volcanoes erupt.

I know, it's not exactly an experiment, but illusions are still cool.

Illusions are images that use your EYES to confuse your BRAINTake a look at this grid:

Did you notice the small grayish dots

between the black boxes. They are notpart of the drawing - they were put there

by your brain! Scientists call this "visual

vibration." Basically it means that whenyou see patterns of black and white, your

eye sometimes confuses the two and

blends them into patterns of gray that

you see here. You are seeing somethingthat is not really there!


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This elephant is missing a leg...or is it? The artist confuses his

viewer by changing they way our brain is used to seeing things.

It seems the more you look at the elephant, the more confusing it gets.

Want to see the gears move?Look at the dot and then move your head towards the screen and away from it.


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This uses visual vibrations to create a cool effect. Try moving your headclose to, and then away from the screen. The fuzzy dots appear to move.

This simple line drawing is titled, "Mother, Father, and daughter" (Fisher, 1968)because it contains the faces of all three people in the title.How many faces can you find?


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Look at the dots in the center.Which one is bigger?

Like many similar illusions, the dots are the same size...really!It can be hard to tell because your eye uses the other dots to make a comparison.

Check out the spiral...except it is not a spiral, just circles.Don't believe me? Use your finger to follow the fake spiral.

The tilt of the boxes fools your brain into believing it is a spiral.


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Hey, this is weird. It looks as though it's moving, but it's not. The shapes confuse the eye (really the brain) into believing that they are moving.

www.sciencebob.com


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y A packet of yeast (available in the grocery store)y A small, clean, clear, plastic soda bottle (16 oz. or smaller)y 1 teaspoon of sugary Some warm watery A small balloon

y 1. Fill the bottle up with about one inch of warm water.( When yeast is cold or dry the micro organisms are resting.)

y 2. Add all of the yeast packet and gently swirl the bottle a few seconds.(As the yeast dissolves, it becomes active - it comes to life! Don't bother looking for

movement, yeast is a microscopic fungus organism.)y 3. Add the sugar and swirl it around some more .

Like people, yeast needs energy (food) to be active, so we will give it sugar. Now theyeast is "eating!"

y 4. Blow up the balloon a few times to stretch it out then place the neck of the balloonover the neck of the bottle.

y 5. Let the bottle sit in a warm place for about 20 minutesIf all goes well the balloon will begin to inflate!


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As the yeast eats the sugar, it releases a gas called carbon dioxide. The gas fills the bottle and

then fills the balloon as more gas is created. We all know that there are "holes" in bread, but howare they made? The answer sounds a little like the plot of a horror movie. Most breads are madeusing YEAST. Believe it or not, yeast is actually living microorganisms!When bread is made,

the yeast becomes spread out in flour. Each bit of yeast makes tiny gas bubbles and that putsmillions of bubbles (holes) in our bread before it gets baked. Naturalist's note - The yeast used in

this experiment are the related species and strains of Saccharomyces cervisiae. (I'm sure youwere wondering about that.) Anyway, when the bread gets baked in the oven, the yeast dies and

leaves all those bubbles (holes) in the bread. Yum.

y clean dry paper clipsy tissue papery a bowl of watery pencil with eraser

1. Fill the bowl with water2. Try to make the paper clip float...not much luck,


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huh?3. Tear a piece of tissue paper about half the size of a dollar bill4. GENTLY drop the tissue flat onto the surface of the water5. GENTLY place a dry paper clip flat onto the tissue (try not to touch the water or the

tissue)6.

Use the eraser end of the pencil to carefully poke the tissue (not the paper clip) until thetissue sinks. With some luck, the tissue will sink and leave the paper clip floating!

How is this possible? With a little thing we scientists call SURFACE TENSION. Basically itmeans that there is a sort of skin on the surface of water where the water molecules hold on tight

together. If the conditions are right, they can hold tight enough to support your paper clip. Thepaperclip is not truly floating, it is being held up by the surface tension. Many insects, such as

water striders, use this "skin" to walk across the surface of a stream.

(The Elephant's Toothpaste Experiment)

yA clean 1

6ounce plastic soda bottle

y 1/2 cup 20-volume hydrogen peroxide liquid (20-volume is a 6% solution, ask an adult toget this from a beauty supply store or hair salon)

y 1 Tablespoon (one packet) of dry yeasty 3 Tablespoons of warm watery Liquid dish washing soapy Food coloringy Small cupy Safety goggles

NOTE: As you can see from the picture, foam will overflow from the bottle, so be sure to do thisexperiment on a washable surface, or place the bottle on a tray.

1. Hydrogen peroxide can irritate skin and eyes, so put on those safety goggles and ask an adult

to carefully pour the hydrogen peroxide into the bottle.


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2. Add 8 drops of your favorite food coloring into the bottle.

3. Add about 1 tablespoon of liquid dish soap into the bottle and swish the bottle around a bit to

mix it.

4. In a separate small cup, combine the warm water and the yeast together and mix for about 30seconds.

5. Now the adventure starts! Pour the yeast water mixture into the bottle (a funnel helps here)

and watch the foaminess begin!

Foam is awesome! The foam you made is special because each tiny foam bubble is filled withoxygen. 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 bottlegot 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 canclean 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 toothpastecoming out of a tube, but don't get the foam in your mouth!


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Hydrogen Peroxide

The Lincoln High Dive!


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y A Lincoln penny (or other small coin)y A piece of card stock or stiff papery A film canister, baby food jar, or other similar size container with an mouth slightly

larger than a penny

y Pencil or peny

Scissors

1. Cut the cardstock paper into a long strip about .75 inches (2 cm) wide and form it into ahoop as shown. The paper should be stiff enough to hold the hoop shape on its own andthe hoop works best when it is between 3-4 inches (8-10 cm) across.

2.

For dramatic effect, fill the film canister with water and place on a level surface.3. Place the hoop on the film canister as shown and balance the penny on the top of thehoop.

4. Time for Lincoln's big moment! Place a pencil through the center of the hoop and in oneswift motion fling the hoop off to the side as pictured. If you do this correctly, the hoopwill fly out of the way, and the penny will fall straight down into the canister with a

splash. 10 points for Lincoln!

THE SETUP THE DIVE


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This is science? You betcha. Part of Newton's first laws says, in general, that an object atrest will remain at rest unless acted upon by an outside force. The energy of your

movement with the pencil was passed on to the hoop, making it fly out of the wayquickly, but the hoop moved too fast, and there was not enough friction to affect the

penny (at rest) on top of the hoop. The penny ended up above the film canister with

nothing to hold it up. It was about then that gravity took over, and pulled the coin straightdown into the waiting water. Yep, Issac Newton and Abraham Lincoln, together in thename of science...sort of.

y A large iron nail (about 3 inches)y About 3 feet of THIN COATED copper wirey A fresh D size batteryy Some paper clips or other small magnetic objects

y 1. Leave about 8 inches of wire loose at one end and wrap most of the rest of the wirearound the nail. Try not to overlap the wires.


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y 2. Cut the wire (if needed) so that there is about another8 inches loose at the other endtoo.

y 3. Now remove about an inch of the plastic coating from both ends of the wire and attachthe one wire to one end of a battery and the other wire to the other end of the battery. See

picture below. (It is best to tape the wires to the battery - be careful though, the wirecould get very hot!)

y 4. Now you have an ELECTROMAGNET! Put the point of the nail near a few paperclips and it should pick them up!

y NOTE: Making an electromagnet uses up the battery somewhat quickly which is why thebattery may get warm, so disconnect the wires when you are done exploring.

Most magnets, like the ones on many refrigerators, cannot be turned off, they are called

permanent magnets. Magnets like the one you made that can be turned on and off, are calledELECTROMAGNETS. They run on electricity and are only magnetic when the electricity is

flowing. The electricity flowing through the wire arranges the molecules in the nail so that theyare attracted to certain metals.NEVER get the wires of the electromagnet near at household

outlet! Be safe - have fun!

one empty 35mm plastic film canister and lid

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