miscellaneous

Galileo’s Free Fall

Galileo's Free Fall You may already know that there is a mystical force called gravity that pulls everything on Earth downward. This is really cool since if we didn't have gravity we'd all be floating around in space. Do you think that this mysterious force pulls heavy objects faster than a light object? Reeko thinks the answer may surprise you. Place newspapers on the floor around the chair. Stand on the chair while your partner lays on the floor peering at the newspaper. Hold the 2 oranges in each hand. Extend your arms straight out away from your body (and over the newspapers) so that each orange is the same height from the floor. Let go of both oranges at the same time. Did they…
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miscellaneous

Diet Coke and Mentos Eruption

Diet Coke and Mentos Eruption Reeko will never forget the first time he discovered this unique experiment. He learned three very important things that he has never forgotten to this day. Firstly, if you mix Mentos and Diet Coke, you get a violent eruption that will spew a gallon of sticky cola on you before you can even blink an eye. As he passed through the lab animal house, on his way to the kitchen to clean up, he learned something else – rats love coke! Before he knew it, he had 50 of those little furry critters clinging to his lab coat, licking away at the sticky mixture that had drenched his jacket (and they jumped him from behind knowing that he wouldn’t be…
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miscellaneous

The evolution of a spider (or not) – science and religion battle over Darwin’s Theory of Evolution

What is the Theory of Evolution? Being a prominent (ahem) member of the scientific community, Reeko has a lot of scientist friends.  Reeko knows that the thing that bugs scientists more than anything, is when people don’t believe their theories (well, that and burning lab coats). And when it comes to Darwin's Theory of Evolution, scientists treat it almost like a religion. On the flip side, some religions have a big problem with the scientists’ Theory of Evolution making the whole subject of “natural selection” a huge heated debate between scientists and religious groups. Scientists theorize that humans evolved from single cells to fish to monkeys. Some religious groups, called creationists, take offense at this proposal saying it’s silly to think that people magically grew, over…
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miscellaneous

Splatter blood for blood spatter analysis

Splatter blood for blood spatter analysis First we will let you in on a little secret. When you or your brother or sister do something wrong, your parents have to figure out who did it. To parents this is like a whodunit game and in fact, they have a secret name for it that they have sworn never to reveal to the kids (breaking this rule can result in loss of their official parenting card). It’s called the “which kid do we smack this time” game. And no, they don’t roll dice or draw straws to figure it out the winner. Parents have an eerie, almost superhero-like ability that allows them to scan human faces to determine the guilty party. It worked so well that a…
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Light

Things aren’t always as they appear – light refraction experiment

Experiment to demonstrate the principle of refraction Ever reached down into the bath tub water to grab a toy and found that it was not in the position it appeared to be in? What you are experiencing is the effect called refraction. When light enters the water (or any transparent material) it slows down slightly. If the light enters the water at an angle then this change in speed causes the light beam to bend away from its original path. This is called refraction. Let's conduct an experiment that allows us to see the effect of refraction. Fill the glass 2/3 full of water. Place the pencil in the glass holding it straight up and down ( not at an angle). Notice that the pencil…
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Light

Fooling Around with your Mind

Using mirrors to confuse your brain (and Dad) Our eyes see everything going on around us.  The eyes then send this information to our brain which then interprets the information they are given.  Sometimes the brain has to fudge a little when making these interpretations.  This is especially true when our eyes see something that the brain knows cannot be true.  In cases like this, the brain interprets the information the best it can and may end up feeling a little bit Have Dad leave the room.  Don't say we didn't warn you. Glue the two mirrors together, back to back.  Be very careful not to cut yourself on the mirrors.  If the edges of the mirrors are too sharp, you may want to apply…
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Light

Eyes in the back of your head

Build a homemade periscope Parents have eyes in the back of their heads – we all know that.  They always know what you’ve done, where you did it, and sometimes even why you did it.  We’ll never fully understand how they do this; even science cannot provide an explanation of this natural phenomena.  But, this experiment can at least put you on somewhat equal ground as we create a gadget that will literally let you see around corners… Cut off the angled top of the milk cartons so each carton has a squared off, open end. On the closed end of the carton, cut a small square hole on one of the sides.  Leave about ¼ inch of carton on each side of the hole. …
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Light

Create an oven using a pizza box

Experiment to create a real oven using a pizza box Does you family head to the kitchen table every time they hear a fire siren? Do you get even with the neighborhood bully by inviting him over to dinner? Does Dad refer to the fire detector as the “oven timer”? It sounds like your family might need cooking lessons. Well Reeko can’t (or won’t) provide cooking lessons but he sure knows how to make a cool little oven – out of a pizza box! And while we’re at it we’ll learn how thermal collectors are able to collect sunlight and convert the solar radiation into heat. The sun is an ultimate form of energy and it has produced that energy for billions of years. Solar…
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Light

An enlightening experiment

Using a mirror to check out the properties of light Light traveling in a straight line appears colorless. But there's more to light than just colorless nothingness. When light passes through a wedge shaped piece of glass called a prism, the light is separated into 7 different and unique colors. You see these colors when light passes through rain or moisture producing a rainbow. Place a mirror in the glass of water at an angle (let it lean against the side of the glass). Turn the glass so the mirror is facing the sun. Hold the paper at a slant in front of the glass. Move the paper around until you see the rainbow colors. You may need to move the paper around slightly until…
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Inertia/Momentum

Shiver me timbers, blow me down

The Coanda Effect experiment Believe it or not, scientist are still arguing (debating would be a better word, I guess) as to exactly what scientific principle should be used to explain why an airplane can fly. One explanation, the Bernoulli Effect is commonly used to explain the phenomenon of flight . In this experiment we demonstrate the second explanation - the Coanda Effect. Light a candle and place it on a table. Place an oatmeal or salt container in front of the candle. Blow against the other side of the container (the side opposite from the lit candle). Be sure to keep your mouth even with the flame of the candle. Bet ya didn't guess that was going to happen - did ya? The Coanda…
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