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19 Dec
0

POPCORN BUOYANCY EXPERIMENT

In Atal Tinkering Labs ATL | No comment

PROCEDURE: 1. Show them the container full of unpopped popcorn. 2. Lay the metal ball on top of the un-popped popcorn and explain that the metal ball will turn into a ping pong ball. 3. Shake the container gently. The metal ball will sink to the bottom, and the ping pong ball will rise to the top, making it look like the metal ball has transformed.   EXPLANATION Objects with a density lower than the fluid that they are submerged in will float and objects with a greater density will sink. In this set-up, the un-popped popcorn form a coarse…

19 Dec
0

TEA BAG ROCKET experiment

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Materials Required a tea bag (I used Earl Grey) a plate a lighter scissors a room without a draft   Safety Considerations Because of the potential fire hazard, this demonstration should be performed by the instructor, not the students.   The tea bag will lift off almost vertically; however, if there are any drafts in the room it will change the path the rocket will take. Therefore, this experiment should be performed away from flammable materials, and students should be seated at an appropriate distance away from the experiment.   This cool experiment is a fun after dinner experiment with…

19 Dec
0

How to make Play Dough

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PROCEDUCE: Add these ingredients to a pan. Stir thoroughly until the mixture is free of all lumps. 1 cup flour 1 cup water 1 teaspoon veggie oil 2 teaspoons cream of tartar 1/4 cup salt Food coloring (your favorite color) Pan Oven 2) Heat over medium heat for about 3 minutes or until the mixture begins to thicken Remove from heat. Let cool, then knead into desired consistency. 3) Store in an airtight ziplock bag   EXPLANATION When heated, starch undergoes gelatinization. or thickening. This is due to hydrogen bonding between starch and water molecules. The granules of starch absorb…

19 Dec
0

Jello and Laser Beam Experiment

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PROCEDURE: Prepare several colors of gelatin dessert )Jello). Make a prediction and then shine the laser through a transparent container of Red Jello Repeat with other colors. Observe   EXPLANATION: Gelatin is an example of a colloid, which is an evenly dispersed mixture that scatters light due to its large particles size. When a laser is shines through the red Jello, the laser beam is clearly visible with the jello it self. The tiny particles of red jello reflect the red light of the laser, making it visible. It is for this reason the red jello transmits red light.  …

19 Dec
0

Black & White Disk Illusion experiment

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The wheel is called Benham’s top and it creates an illusion of color when black and white patterns rapidly change. It is named after the toymaker Charles Benham, who, in 1895, created a top painted with the pattern shown.   When you spin the disk and stare at this illusion you may see arcs of subtle color. These are called Fechner colors and appear from nowhere.   When you spin the disk and Stare at this black and white wheel long enough and you may see a colors appear out of nowhere. But incredibly, different people see different colors –…

19 Dec
0

ROLLBACK CAN Experiment

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The reason that the can moves backwards is the transition of potential energy to kinetic energy. In the case of the rollback can, kinetic energy is transformed into an easily observable example of elastic potential energy, which is then transformed back into kinetic energy.   The way this works is when I rolled the can forward, I gave the can kinetic energy. Gravity exerts a lot of force on the heavy battery, pulling it down and causing it to resist the twisting motion of the rubber band. As the can rolls forward, the stubborn, heavy battery doesn’t turn with it,…

19 Dec
0

DIY Moon Sand Experiment

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Sand is an excellent tool for exposing children to a wide range of sensory experiences.   Kids can be creative as they can squish it, shape it, and mold it in Different containers. At the same time be social as while they are playing in the sand they will talk about what they are doing.   You can hide marbles or other objects to make them think how to find and counting the number of marbles in the sand.   It never dries out so it can be used over and over. I store mine in ziplock bags.   You…

19 Dec
0

Surface Tension and a Ping Pong Ball Experiment

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Can you place a Ping Pong Ball in the center of a cup or bowl and not have it move to the side? Answer is yes, if you break down the surface tension. Check it out!   Placing the Ping-Pong ball at the surface of the water creates curvature in the water surface all the way around the ball. The surface tension will act to minimize the total surface area. Unless the ball is placed exactly in the middle of the cup   Which is nearly impossible!   There is an asymmetry in the surface curvature that will draw the…

19 Dec
0

Dissolving Styrofoam Experiment

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SAFETY: This is a really cool experiment, but it requires a few safety precautions. Acetone should only be handled by an adult and due to the fumes of acetone, it should be done outside. This solvent is very flammable. Keep away from all flames.   Have your kids predict what will happen to the Styrofoam cup when you put it into Acetone? Acetone is (Nail Polish Remover). Sounds so much more cooler saying Acetone.   This is a tricky one. It looks like a chemical reaction because it is so dramatic, but actually it is a physical reaction. Acetone is…

19 Dec
0

Make your own Mucus experiment

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PROCEDURE 1) Ask a adult to heat 1/2 cup of water to it boils. 2) Then take the pot off the heat. Then add 2 drops of food coloring. I use Gross Green 3) Add 3 packages of unflavored gelatin and stir for a couple minutes. 4) Then add about 1/2 cup of corn syrup so you have about 1 cup of thick mixture. 5) Stir with a fork and lift out some long strands of gunk. 6) As it cools, you might need to add water, spoonful by spoonful.   EXPLANATION You have just made fake or artificial mucus….

19 Dec
0

Karate Chop With Air Pressure Experiment

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EXPLANATION I was able to chop the ruler in two because of air pressure. When I spread out the newspaper on top of the ruler, I basically created a large suction cup because I’ve preventing air from flowing underneath. When I strike the ruler, it tries to lift up against the newspaper, but because the air can’t flow very quickly into the space between the table and the newspaper, most of it simply pushes down on the newspaper (and the ruler).   Since I had 8 inches of ruler covered by the newspaper. And one inch wide, that would mean…

19 Dec
0

Earthquake Shake Table (Terremoto) Experiment

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There are several different experimental techniques that can be used to test the response of structures to verify their seismic performance, one of which is the use of an earthquake shaking table (a shaking table, or simply shake table)   Building in earthquake country can be a tricky business. Architects and engineers run simulations using models and shake tables to test the integrity of buildings and determine necessary reinforcements. In this activity, I use a very simple, non motorized shake table to test my structures.   PROCEDURE Place two boards or blind voters on top of one another. “Rubber bands”…

19 Dec
0

Floating Dry Erase Letters Experiment

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Permanent markers, like Sharpie makes, rely on inks with a strong adhesive to stick to almost any surface you write on. But dry erase markers use inks with a minimal adhesive, making notes and drawings that can be easily wiped away afterwards.   The ink in dry erase markers is also insoluble. That means it can’t be dissolved in a liquid, and more importantly, it means it’s less dense than water. When you pour water onto a dry erase word science on a smooth surface (Plate for the Dollar store), a strong buoyancy force overcomes the stickiness of the ink,…

19 Dec
0

Will a Bowling ball Sink of Float? density experiment

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The answer is it depends on the bowling ball.   This is the same reason boats can float even though they weight thousands and thousands of pounds. They take up less mass then the volume of water they are displacing.   When the ball is submerged in the water, it displaces its volume in water. According to Archimedes’ principle, the water can “push back” with a force (buoyancy) equal to the weight of the water that has been displaced.   The magic number for a bowling ball to float is 12lbs, when the ball is 12.5lbs then it will sink….

19 Dec
0

Sensory Systems Respond to Water Temperature Experiment

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If you submerge one hand in hot water and the other in ice-water simultaneously for about a minute, then immediately put both in room temperature water, what will be the temperature sensation of each hand?   Most of our sensory systems respond to **changes** in stimuli. They are not absolute detectors.   Thus if a stimulus is constant, it will eventually be ignored by the nervous system. Cases in point. Why don’t you feel the clothes you are wearing after you put them on? Because they exert a constant pressure on your skin. Why don’t you hear (after a while)…

19 Dec
0

Bubble Prints Experiment

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When two bubbles meet, they will merge walls to minimize their surface area. If bubbles that are the same size meet, then the wall that separates them will be flat. If bubbles that are different sizes meet, then the smaller bubble will bulge into the large bubble. Bubbles meet to form walls at an angle of 120°. If enough bubbles meet, the cells will form hexagons. You can see this structure in the images you make in this project.   The forces acting between the molecules of the bubble cause it to form the shape that encloses the most volume…

19 Dec
0

Atmospheric pressure Mat Experiment

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The atmospheric pressure mat is approximately 10.5 x 10.5 inches and it does not let air under it when pulled straight up because of a tight seal between the rubber and surface.   There is approximately 1620 lbs of pressure pushing it down from the air mass above it and as long as no additional air can get under the mat it can theoretically lift that much pressure. In reality, it’s much less because of the imperfect seal between the mat and object and the small quantity of air under the hook.   As you pull up on the hook,…

19 Dec
0

AIR Cannon (Airzooka) experiment

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The air cannon also known as the“vortex generator” is one of my all time favorite experiments. The air that shoots out of the cannon makes a vortex of air that is generated because the air leaving at the center of the hole is traveling faster than the air leaving around the edge of the hole. The air around the edges takes longer to get out of the can.   Wouldn’t be cool if we could see the vortex and it shot out of the cannon? Well we can and this is where this experiment becomes really cool. Fill the cannon…

19 Dec
0

Pop a balloon that is inside another balloon Experiment

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The power of the sun. Don’t blink or your going to miss this one. Why does the inside black balloon pop before the outside clear balloon pop when using a magnifying glass? The clear balloon has most of the light pass through it like a window, but the black balloon surface that doesn’t reflect any light… it absorbs almost all of it. With a surface absorbing all of that light, it also absorbs the energy. In this case, that energy is heat, and a lot of it. The heat absorbed by the black balloon from the focused sunlight quickly causes…

19 Dec
0

Soda Can Jump experiments

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Soda can Launch! Kids will love this hands on experiment. See how far you can launch your soda can? Blowing air in between the can and the coffee cup creates an area of high pressure between the bottom of the can and the inside of the coffee mug. The harder you blow, the more rapidly the air pressure between the surfaces increases.  

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