Pressure

Magical inflating balloons

Magical inflating balloons One of the first things a little scientist should learn is that heat causes things to expand (get bigger) and cold causes things to contract (get smaller). Things such as air will contract and take up less room when cooled. Similarly, things will expand when they get hot. If you don't believe this, carefully observe Dad's head the next time you break one of his expensive tools (Reeko tip - observe from a distance). Ok, so Reeko's gonna save you some heartache. Rather than test this by breaking one of Dad's tools, let's try the following experiment instead. Fill the bottle with hot water. Fill the bowl with cold water. Let both sit for one minute. Then empty out the bottle. Stretch…
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Pressure

Build a real working hovercraft!

Build a real working hovercraft! So you want your very own hovercraft. Well once again, Reeko is here to help. Of course it's only big enough to hold a mouse (maybe two if the first one scrunches down real low) but hey, we're not old enough for a driver's license Cut a 4 inch square out of the cardboard. Punch a hole in the cardboard - you may need to get an adult to do this part. If you attempt it yourself be very careful. Make sure you punch the hole in the center of the cardboard. The hole should be the same size as the hole in the spool. Glue the spool to the cardboard on top of the hole. Make sure you glue…
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Chemistry

Using dry ice to blow up a balloon

Blow up a balloon with solid carbon dioxide Most substances have three states – solid, liquid, and gas. When they go from a solid to a gas, they usually turn into a liquid in between. Ice is a good example. It first melts into a liquid and then evaporates into a gas. Sublimation is when a chemical compound turns from a solid to a gas without turning into a liquid in between. Solid Carbon dioxide (or dry ice) and iodine are two compounds that sublime. When dry ice sublimes, it turns directly into carbon dioxide gas which expands in the process. Therefore, we can take dry ice, let it sublime into a gas, and use the gas to blow up a balloon. Follow these steps:…
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Chemical Reactions

Blow up balloon

Blow up balloon with baking soda and vinegar When vinegar is mixed with baking soda, a double replacement reaction takes place. The end result is carbon dioxide but behind the scenes, there is more than one reaction taking place. Put a tablespoon of backing soda on to the center of a paper towel. Fold the paper towel over the baking soda a few times. The objective is to create a “time release” mechanism for our reaction. Pour ½ cup vinegar into a plastic bag. Pour ¼ cup warm water into the back with the vinegar. Hold the baking soda filled paper towel in the mouth of the plastic bag by pinching the sides to hold it. Don’t let the paper towel touch the solution yet.…
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Atomic/Electric

Waxing poetic – soda can, balloon, and static electricity experiment

NEWSFLASH - Soft drink cans HATE balloons! How many times have you snickered at Dad walking around the house with a sock stuck to his back? Or watched as he ran his hand up his shirt to scratch and pulls out one of those antistatic dryer sheets? The reason these items sticks to Dad has nothing to do with his popularity in the laundry world. It’s simply due to the fact that the laundry items are chock full of electrons and Dad, well, he’s just not. Take a soda can and lay it on its side on a smooth flat surface. Now rub the balloon back and forth on the top of your head. Yes, Reeko agrees that you look pretty silly rubbing that balloon…
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