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Floating Rice with Friction Experiment

Start off with a one question SURPRISE QUIZ. Its yes no answer and self grading. You can do it.   Can I lift a bottle full of rice by putting a chop stick in the bottle of rice?   Well lets see.   Don’t underestimate the Power of Friction. This is something that happens everyday, but we don’t notice it.   What’s Going On? When the rice is inside the bottle, there are grains next to one another, but there is a little bit of space — an air pocket — in between each grain and its neighbor. Which allows…

Dancing Ping Pong Ball experiment

Why does this happen? Glass has a natural frequency where it vibrates. When you rub your damp finger on the outside of the glass your finger sticks to the glass because of friction and then slips because of the water which forms a cushion that reduces friction. When this slip and stick happens in equal intervals it causes the glass to vibrate.   The vibration from the glass pushes the air molecules around the glass in equal intervals, causing compression waves to form and ultimately make the sound we hear. The ping pong ball dances because it gets pushed by…

The Spinning Ball experiment

Place the jar over the ball so that the ball is inside the mouth of the canning jar. Then start spinning the glass around in a circular motion. Once the ball starts spinning inside the glass lift it from the table top. The ball is lifted from the table and will continue to spin inside the glass until it loses is speed.   As a ball velocity increases inside the glass, the centripetal force increases. That force is what’s keeping the ball stuck to the walls of the glass.   As the ball goes faster, the resulting friction begins to…

Magnetic Money Science Experiment

This experiment involves magnets, be aware of the danger of children swallowing them. Adult supervision is required.   Try holding the magnet over the $1 bill and see which part is pulls up.   The Federal Reserve prints money they use a iron oxide which is magnetized when another magnet is present.   Vending machines use scanning technology called Magnetic Ink Character Recognition (MICR). This technology is use to find the magnetic pattern on it and to determine its denomination. Counterfeit detectors use similar technology to detect fake bills.  

Cups and ball Centrifugal Force Experiment

Now the object of this experiment is to separate the two balls – put one ball in each glass, this would seem tough. But just place the glasses on a table and spin them! The balls will be separated. The spinning glasses will make the balls fly towards the extreme ends.   When you swing an object around on a string or rope, the object will pull outward on the string. This is called the centrifugal force and is caused by the inertia of the object, where it seeks to follow a straight-line path. It is also called an inertial…

How much water is in a ORANGE? Experiment

All living things must have water to survive. The good ol water cycle recycles water all the time. Evaporation is the change of liquid-water to water vapor. Evaporation of water occurs everyday whether it is in a cup or lake. Evaporation is a major part of the water cycle.   After the orange slices where completely dry, which took about 24 hours. You can speed up the process by using a hair dryer or fan. I just left mine in the sun the natural way. I put them back on the weighing scale. Remember the orange weighed 61 oz (1,803…

Mpemba Effect

This phenomenon of hot water freezing faster than cold water is known as the Mpemba effect.   I tried this 3 times with the same results.   Hot water seems to freeze faster than cold water, known as the Mpemba effect. The effect was named after the Tanzanian student who in 1963 noticed that hot ice cream mix freezes faster than a cold one. The effect was first observed by Aristotle in the 4th century BC, then later Francis Bacon and René Descartes.   Theories for the Mpemba effect have included faster evaporation of hot water, therefore reducing the volume…

Absorption and dissolving with sugar cubes in water experiment

When I pour the water on to the plate you noticed that the bottom sugar cube absorbs the colored water and it slowly moves upwards to the top sugar cube. This is because adhesive forces between the water molecules and the sugar molecules, along with cohesion with- in the liquid, allowed the water to move up the sugar cube tower against gravity. This process is called capillary action.   The reason sugar dissolves in a cup of coffee? It’s because of the way water molecules interact with molecules in other substances. A water molecule has powerful magnetic properties, because of…

Paper Chromatography Experiment

Chromatography is a technique that is used by scientists to separate mixtures. A mixture is placed on paper and a liquid is added. As the liquid travels through the paper, it acts as a solvent and dissolves everything in the mixture, so the mixture begins to travel with the liquid.   The various components of a mixture all have different properties, so they will travel at different speeds and separate. For example, if we do paper chromatography with black ink, we will observe a separation of the colors that make up the black color! What pigments (colors) do you think…

Separating Books Experiment

Start off with two books the same size, interleave them together. About one inch (2.54cm) overlapping. Then you and a partner pull as hard as you can to separate the books. You can’t do it, because Friction is a DRAG!   All that is holding the two books together is friction. This is the same force that acts to stop you sliding a book across a table.   When you interleave the two books there is a small force pulling the two books together created by the spine of the book.a table.   This compressive force will create a frictional…

Reverse Image Magnifying Glass experiment

Put the magnifying glass between the wall and the window About 10-30 cm (4 -12 inches). You will see the right distance will be in focus on the wall.   Most magnifying glasses are double-convex lenses and are used to make objects appear larger. This is accomplished by placing the lens close to the object to be viewed. In this way the light rays are bent toward the center of the lens. When these bent rays reach the eye they make the object appear much larger than it actually is. However, if the object is far enough away from the…

Spinning fluids in your ears Experiment

The principle of inertia, If an object is at rest, it will stay at rest until something forces it to budge, and if it’s moving, it will keep moving until ground to a halt. That’s why spinning makes you dizzy.   There are three Loop-shaped canals in your inner ear contain fluid and fine, hair-like sensors that help you keep your balance. Each one senses the movement of your head along different axis. Your ears sense motion by detecting the way tiny strands of hair lining the canals wave back and forth in this moving liquid, like water plants swaying…

Earthquake Epicenter Experiment

The epicenter is the point on the Earth’s surface that is directly above the hypocenter or focus, the point where an earthquake or underground explosion originates.   Nearly everyone in California lives within 30 miles of an active fault that could cause a damaging earthquake. In fact, some 2,000 known faults criss-cross California, and scientists continue to discover new ones.   Earthquakes happen all the time Since 1994, according to the U.S. Geological Survey (USGS), California has experienced 1,172 earthquakes with a magnitude 4.0 or greater   • As the magnitude 6.9 Loma Prieta earthquake of 1989 proved, sometimes the…

How to make SMOG experiment!

Smog is a mix of natural fog – tiny droplets of water in the air and carbon dioxide smoke from pollution. IT forms a thick, dirty, smelly atmosphere.   When I put the lighted paper in the jar, I made some of the water moisture inside the jar evaporate into water vapor.   The ice made a small amount of water vapor condense. It turned into droplets of water in the jar. This appears as a mist in the jar.   Warm damp air meets cold air. The cold air makes the moisture in the warm air condense into tiny…

Bird in a cage Experiment

We have very powerful brains. Our brains want to make sense of what they see, so they join images together to makes sense of them.   It’s optical illusion is called a thaumatrope, It is the beginning of animation as we know it, and on the surface it does seem to use the same concept. However, while both basically make use of fast changes of a frame or image to create a visual illusion, a thaumatrope is caused by images/light in different locations while in animations there are different images/light in the same location.  

Magic Marbles with help of inertia Experiment

Inertia is the way a body will stay still, or move, unless acted upon by any external force.   What happen? The marble that had been in rolling stops. And the one that had been still, now rolls.   The force of the rolling marble transfers to the other one. It stops the first and sets the second in motion.   Why did it happen? * Inertia is the way one object sets another object in motion * An object at rest tends to stay at rest. An object that is moving tends to keep moving in the same direction….

How to Shrink a Chip Bags Experiment

Why do they shrink? Well The shiny chip bags are made with a piece of aluminium foil sandwiched between two plastic films –   The aluminium prevents air entering the packet and keeps the chips fresher for longer. The plastic in the chip packet is made up of long polymer molecules that have been stretched so they are almost straight.   When the plastic is heated in the oven, the molecules that make up the plastic are energized so they start to vibrate faster. The molecules end up wiggly, making the plastic film thicker and shorter. And thus your chip…

Baked Ice Cream experiment

Even wonder how ice cream can be baked without completely melting? Try this.   The warm oven cooks the meringue, but not all the ice cream will melt.   Why: Cream of tartar is an acid. When it becomes moist, it releases carbon dioxide. This helps to aerate the meringue. When the egg whites are beaten, they too make small air spaces. Both the air and carbon dioxide are trapped in the beaten egg white. They act as an insulator. As the sugar cooks it hardens. It also acts as a insulator.   The insulation has small air spaces trapped…

Safe Total Solar Eclipse viewer

On Monday, August 21, 2017, all of North America will be treated to an eclipse of the sun. Anyone within the path of totality can see one of nature’s most awe-inspiring sights – a total solar eclipse. This path, where the moon will completely cover the sun and the sun’s tenuous atmosphere – the corona – can be seen, will stretch from Lincoln Beach, Oregon to Charleston, South Carolina. Observers outside this path will still see a partial solar eclipse where the moon covers part of the sun’s disk.   Who Can See It? Lots of people! Everyone in the…

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