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Keeping Paper Dry Underwater Experiment

Atmospheric pressure is a considerable force we rarely notice. That’s because air exerts its pressure on us equally in all directions. At sea level, one cubic metre of air weighs around 1.2kg which is roughly the same as a litre of milk. Gravity keeps us and our atmosphere firmly stuck to the Earth but air is a fluid that flows readily, allowing us to move through it with ease. At low speeds it provides few clues of its presence to our senses. Only when we pace through it at speed, or when huge bodies of air get moving as wind…

How to build a Helicopter with pencil Experiment

I made the paper with thick card stock paper. 4 inches (10cm) by 2 inches (5cm). Bend the paper on two slides down. You can try bending the paper shorter or longer to see if you get a better lift.   When you spin the piece of card, it moves through the air like a wing. As the air hits the flaps, it is forced downwards. Isaac Newton worked out that if you push something one way, it will push you back; so the card pushing the air downwards means that the air pushes the card upwards.   Essentially you…

Ping Pong ball & Atmospheric Pressure experiment

To start, the bottle is filled about 2/3 full. You can hold the ball on top of the bottle and dip the bottle upside down and then bring it back up right side up. Now try to slow tip the bottle sideways to seal the ball to the bottle.   If this does not work then hold the ball with your fingers against the glass and the bottle tipped up. and tip it upside down. Hold the ball loosely against the glass so that water is allowed to leak out. Eventually the air pressure inside the bottle falls to a…

Expanding Ping pong ball Experiment

1) If you don’t have aa ping-pong ball with a dent or indentation in it, then use your thumb and make a small indentation. 2) Then place ping pong ball in a galls nearly full of water. 3) Turn on microwave for 1 minute 4) Using a oven mit remove the glass. Be careful as the water will be very hot. Remove ping pong ball and Observe.   Science behind this experiment As the ping pong ball is heated, the air inside will be heated as well. As the molecules of air are heated, they will begin moving faster. AS…

Deflated Balloon experiment

1.) Fill 2 liter bottle to the brim with water 2.) Place a deflated balloon over the mouth of the bottle 3.) Poke a small hole in the side of the bottle, bear the base, with a nail 4.) Observer the behavior of the balloon 5.) Lift the balloon up into the air and pull up on it several times until it gets pushed down into the bottle. Observer the distance the water travels through the hole as you are dong this. 6.) Once the balloon is inside the bottle and completely inverted, blow air into it to inflate it….

BAKING POWDER SUBMARINE EXPERIMENT

Here’s how to make your own Baking Powder in less than a minute. 1 teaspoon baking soda 1 teaspoon cream of tartar   Mix both together and you have Baking Powder.   After you get your submarine ready, put some Baking powder in the bottom and let it sink to the bottom.   The baking powder will come in contact with water, which will in turn cause a chemical reaction. This reaction will produce air bubbles along the bottom of the potato, causing it to rise back to the surface. When the submarine gets to the surface, the bubbles will…

Centrifugal sprinkler (Sprinkler Straw) Experiment

Centrifugal sprinkler this is a very fun and messy Hands-on experiment (physics, mechanics, inertia, centrifugal force, pump). A straw and a skewer can turn into a pump with a twist of your fingers! Once you have secured anything you want to stay dry, this fun experiment is a good way to introduce centrifugal forces and the principle behind many pumps.   When you spin the straw it forces the water inside to spin. If an object is spinning anything on that object appears to feel a force pushing it outward.   This means that in your straw the water is…

Bernoulli Principle with balloons Experiment

Like everything else, the balloons are surrounded by air pressure. When I blew between them with the straw, I changed the pressure. Either the air between them stopped pushing as hard, or the air on the outer sides began pushing harder. Which do you think happened? As air squeezed between the balloons, it sped up, and lost pressure, and stopped pushing as hard. So the higher pressure of the air on the outer sides of the balloons pushed them together.   What would happen if you blew along the outer side of one of the balloon? When I blew on…

Baking Soda Powered Boat experiment

This baking soda experiment boat is a fun hands on experiment. To make it go farther try doing it in the bathtub. You can also experiment with the amount of baking soda and vinegar you add to see if it goes faster or farther.   What’s going on? If you mix baking soda and vinegar, you get a chemical reaction which creates carbon dioxide gas. When this happens inside your bottle boat, the gas only has one way to escape, and that’s out the straw. The gas flying down the straw and out the back pushes the boat forwards.  …

Balloon water pump Experiment

Air pressure outside the balloon pushes the air in the balloon into the bottle which takes up more space and pushes the water up the straw and out.   You can put a valve between the balloon and the bottle or a clothespin to stop the air and make your own drinking fountain.  

Rocket Pinwheel Wind Power EXPERIMENT

The Wind powered balloon pinwheel is an example of Newton’s Third Law of Motion, which states that for every action there is an equal and opposite reaction. When you have blown up a balloon and let it go you’ve experienced this law by watching the balloon fly around as the air comes out. Air has mass and is made of molecules. The air molecules that are pushed out of the balloon push against the molecules in the atmosphere creating a reaction force called thrust that acts on the balloon. Thrust acts on the balloon with equal force, and in the…

Straw Air Motor Propeller Experiment

This Fun and easy experiment is great for kids. Taping different color pieces of paper or tape on the propeller to make fun designs.   When you blow into the straw and an air exits from the first and second incisions. Thus, the air turns propeller. The faster you blow the faster the propeller will spin.  

The Ineffective Drinking Straw experiment

How to discover how air pressure affects the operation of a drinking straw? 1) Please a straw in your mouth with the other end in the glass of water. 2) Place a second straw in your mouth, but do not place the other en in the water. 3) Attempt to drink from the first straw. Are you successful?   Science behind it. You do not actually suck liquid through a straw. Air pressure pushing on the surface of a liquid forces liquid up the straw and into your mouth. SAY WHAT?   This happens when you reduce the pressure inside…

Homemade Water Thermometer Experiment

Materials: Stove, Drill, Jar with lid, clear straw, frying pan and food coloring.   Safety Precautions: Perform only under adult supervision. Excise caution with hot water. Handle jar bottle with pot holders as the water is very hot.   Procedure: Drill a hole in the in the top of the jar lid so that a drinking straw will fit snugly through it. Fill the jar with water to the brim. add a few drops of food coloring. Place lid on the jar. Insert straw through the hole in the jar lid so that it touches the bottom of the jar….

Magic Breath Experiment

Procedure 1 Fill cup A with 200 mL of water. 2 Put 10-12 drops of phenolphthalein solution in cup A with water 3 Add Sodium Carbonate to cup B 4 Pour cup A into cup B 5 Insert the straw into the cup and blow OUTWARD. 6 The color will start to change back to colorless.   Explanation Phenolphthalein is an acid/base indicator. It is colorless when it is an acid and pink when it is a base.   Phenolphthalein is added to water, which is then poured into a second cup B containing a base (sodium carbonate). If the…

Slingshot Straw Rocket Experiment

To launch, hold the rocket by the straw right below the paper clip or if you leave room on the bottom. Hook the rubber band with the paper clip and pull back. Point it straight up in the air. Never point at other people. As you let go of the rocket, flick the craft stick forward.   The energy the rocket needs for flight comes from the rubber band. Rubber bands are a great example of potential energy. Potential energy is energy that is stored up, not being used, just waiting to be unleashed. Think about when you stretch a…

Boyle’s Law in a Bottle experiment

Materials: Balloon, Straw, Bottle, Safety goggles & Fizz-keeper   Safety Precautions: Wear safety goggles. To avoid over pressurizing the bottle, do not pump up the bottle with the fizz-keeps more than 100 times. When releasing the pressure, unscrew the Fizz-Keeper slowly from the bottle. Never aim the Fizz-Keeper at another person, and never place your face directly over the Fizz-Keeper, especially when unscrewing it from the bottle. Never use the Fizz-Keeper with a glass bottle.   Procedure: Blow up balloon inside of a 2-liter bottle and tie it off. The balloon can be of any size. You must insert a…

Straw mister Experiment

As you blow through the straw, the air rushes out with great speed. So the air goes over the other straw with even greater speed. This leads to a low pressure over the other straw in the water and water rises in this straw. The Rising water hits the air and becomes a mist/spray.   The creation of low pressure due to high speed air is according to Bernoulli’s principle. This is the same principle which says that we should not stand near a fast moving train, as low pressure created there can suck us towards the train and consequences…

Homopolar motor experiment

SAFETY NOTE: Neodymium magnets are extremely strong and MUST BE KEPT OUT OF REACH OF SMALL CHILDREN! Do not give them to any child who might put them in their mouth, they are dangerous if swallowed and must be surgically removed!   For more about neodymium magnets safety and precautions go here Additionally neodymium magnets can interfere with electronic devices so please keep them away from phones! Also please note that these motors do heat up. See our TIPS section for safety precautions.   TIPS & PRECAUTIONS: • MONITOR THESE FOR HEAT! Some of the motors that got going really…

Magnetic Iron Filings kit

Iron Filings kit is a super fun experiment. Make different shapes as you move the magnet on the back side of the plastic case moving the iron filings into different shapes. Pull the magnet off and the iron filings fall. SUPER COOL!  

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