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SOLUTION OR SUSPENSIONS? experiment

Objective: To differentiate between solutions and suspensions   Materials: Overhead projector Transparent cups Unopened can of clear carbonated beverage Other samples of soda Muddy water   Procedure: Place a transparent cup on the overhead projector. Quickly open the can of clear soda and pour it into the cup. The projected image will initially turn black, then eventually turn clear! Illuminate cups of soda, milk and muddy water on the overhead.   Explanation: This demonstration graphically illustrates the difference between a solution and a suspension. A solution is a homogeneous mixture with only one phase. It will never settle out, and…

LEAF TRANSPIRATION Experiment

Did you know that plants transpire? It’s kind of like people perspiring, but not quite. A simple analogy to help explain the act of transpiration is that a plant transpiring is like a human sweating. Humans sweat by excreting water through pores to cool down. Similarly, a plant goes through transpiration to help carry nutrients throughout the plant and to maintain structure.   Objective: To show transpiration by capturing the water that evaporates through the leaves.   Materials: * A plant * Ziplock bag * Bread tie or tape   Procedure: 1. Place a ziplock bag over some leafs. 2….

WHY IS MUSTARD YELLOW? Experiment

Objective: To discover why mustard has a characteristic yellow color.   Materials: Mustard Ammonia Eye dropper or pipette Clear plastic cup Vinegar   Safety Precautions: Perform this experiment only under adult supervision. Wear safety goggles. Ammonia is very poisonous. Do NOT eat the mustard after adding ammonia. Do not smell or inhale ammonia fumes. Do this in a well ventilated area.   Procedure: 1) Pour a little mustard in the clear cup. the amount is not crucial 2) Add ammonia drops until you note a color change 3) Add vinegar drops until the mustard returns to its original color. 4)…

MAKING A FLOW MOTION TUBE EXPERIMENT

Objective: To observer interesting flow patterns in a liquid.   Materials: Liquid hand soap containing glycol stearate, not glycol distearate (some, but no all, brands of Soft soap will work) 20oz plastic soda bottle, or the suitable container Food coloring Water   Procedure: Fill about one-fourth of the bottle with liquid soap. Add 5 drops of food coloring. Slowly fill with water to avoid suds. Fill to brim. Screw cap on tightly and shake until well mixed. Invert the bottle to observer and interesting swirling pattern.   Explanation: The interesting patterns that develop when your bottle is inverted are due…

ELECTRORHEOLOGICAL FLUIDS and balloon Experiment

Materials: Cornstarch Vegetable oil Balloon Plastic cup   Procedure: Add 1/4 cup (60ml) of corn starch to 1/4 cup (60ml) of oil in a cup. Stir thoroughly. Rub a balloon in your hair. Now slowly pour the oil-cornstarch mixture into another cup. As you are pouring, bring the charged balloon near the stream of fluid.   Explanation When you mixed the cornstarch and oil together you created a smart material called an electrorheological liquid. That is, a liquid that gets thicker in the presence of an electrical field. You created a field of electricity (called static electricity) by rubbing the…

Hybrid Pasta Rocket Engine Experiment

The oxygen flow is generated from the hydrogen peroxide. The hydrogen peroxide molecule looks a lot like the water molecule, only it has an extra oxygen atom. When you add the yeast to the peroxide, it acts as a catalyst and breaks off that extra oxygen, which bubbles up and out of the hole in the lid.   It’s important that you don’t screw the lid onto the jar – just rest the lid (without the screw-on ring) on top of the jar. Since there’s no nozzle on the end of the pasta, the fluid is going to be pretty…

Iodine clock reaction Chemistry Experiment

I’m going to add the chemical solutions into 2 cups which I marked A & B. both cups I already pour 40 ml of distilled water, then in cup A I add (2) small scoops of Sodium Iodate.   This experiment comes in a kit with the details where to buy it in the description below.   Now for cup B add (1) scoop of sodium sulfite and (4) scoops of Citric acid. Then add 8 drops of Starch solution. Stir both cups very good until it all dissolves.   Now to make the magic happen. I’m going to Pour…

Two Stage Film Canister Rocket experiment

You can do one stage Rocket or a Two Stage Rocket. It took me over 30 tries to get it to get the Two Stage Rocket to work. This was the hardest experiment I have ever done!. I still don’t think NASA will hire me even after my great success. : )   Caution: if it does not launch, wait at least thirty seconds before examining the canister. Usually the cap is not on tight enough and the carbon dioxide has leaked out instead of building up.   The water dissolves the Alka-Seltzer tablet and starts a chemical reaction, which…

DOES ICE MELT FASTER IN FRESH OR SALT WATER? Experiment

PROCEDURE: Put your favorite food coloring in a ice cube tray with water and freeze. Fill one transparent cups up with tap water, and the other with tap water and add salt. Observe the rate of melting of each ice cube.   EXPLANATION: I love the results of this experiment as it really surprise me. When I put salt on a ice cube it melts the ice very fast and when I saw this I could not believe it. The ice cube in the salt water melts much slower then the one in the freshwater.   In the salt water…

Film Canister SUB – powered by Alka-Seltzer experiment

PROCEDURE: 1) Drill a small hole in the lid of the film canister using a drill 2) Add just enough pennies to the canister so the it will sink. Remove one of the pennies, so the canister will now float. 3) Fill the canister with water, drop in a small in a small piece of the Alka-Seltzer tablet and then replace the lid 4) Quickly drop the canister, lid side down into the cylinder/tank that is full of water. The canister should sink to the bottom, and in a short time it will rise back up to the top. 5)…

Milk Experiment

Is there Plastic In milk? Well, sort of. You made a substance called CASEIN. It’s from the latin word meaning “cheese.” Casein occurs when the protein in the milk meets the acid in the vinegar. The casein in milk does not mix with the acid and so it forms blobs.   The milk will boil and being to form tiny lumps (called curds) in a clear liquid (known as whey…is the Little Miss Muffet rhyme sounding a bit familiar right now?).   The curds will form a blob at the bottom of a clear liquid. The blob is actually fat,…

Drops of water on a PENNY experiment

Surface tension give water some amazing properties, use them to see how many drops of water fit on a penny. I was able to get to 25 & 31 drops. How many can you get? If you don’t have a penny any small coin.   Experiment 1) Wash and rinse a penny in tap water. Dry it completely with a paper towel. 2) Place the penny on a flat surface. 3) Use an eyedropper or pipette to draw water and, carefully, drop individual drops of water onto the flat surface of the penny. 4) Keep track of the water drops…

Home Made Lava Lamp Experiment

Oil and water don’t mix because of how their molecules are constructed. Water is what is known as a polar molecule. Vegetable oil, on the other hand, is a nonpolar molecule. Food coloring is a polar molecule because it dissolves in water.   Here’s the surprising part . . . the Alka-Seltzer tablet reacts with the water to make tiny bubbles of carbon dioxide. These bubbles attach themselves to the drops of colored water and cause them to float to the surface. When the bubbles pop, the color drops of water sink back to the bottom , and the whole…

Convection Currents 2 Experiments

The tank is filled with room temperature water and both food-coloring dishes are fill with room temperature water. Place under the tank one-cup ice cold water and one with boiling hot water. Then fill your pipettes up with the food coloring. I use blue representing cold and red for hot. I continue to squeeze the pipettes multiple times so you can see the currents.   You can see the red is rising creating low pressure, as the hot air rises we can see the blue food coloring representing the cold air moving into replace the warm air that is rising….

Hand Boilers Experiment

PROCEDURE 1) Simply wrap your hands around the hand boiler. You don’t need to squeeze tight. Then watch the gas push the liquid from the bottom to the top. The liquid mY bubble and appears to boil. But not for everyone.   EXPLANATION: The heat from your hand transfers to the liquid in the bottom of the boiler. This increase in temperature causes the pressure inside the bulb to rise. As a result the liquid moves to the top of the hand boiler bulb. After almost all of the liquid has moved from the bottom to the top of the…

Dancing Droplets of water experiments (Leidenfrost Effect)

Why does a droplet of water not boil off immediately when we put it on a super hot pan? When the pan surface is clean and very hot the water underneath the droplet boils instantly and create a thin layer of steam under the drop. This layer of steam insulates the cold water from the hot pan and the hot pan from the cold water, the heat transfer is reduced considerably.   A tiny graphic pops up for a very short time that illustrates this leidenfrost effect, if you blink you miss it.   The underlying physics of the effect?…

Ice and Oil physics Experiments

Both oil and ice can be slippery, but this is where the similarity ends. Oil and ice have very little in common. Actually, oil doesn’t like ice and especially melted ice.   You notice the ice cube goes down to the veggie oil layer as heavier then the baby oil. Oil is known as hydrophobic, meaning that it repels water. When you put the ice cube in the oil it begins to melt. It doesn’t mix with the oil because oil is hydrophobic. This explains why the oil and water don’t blend together, but this doesn’t explain why the water…

DENSITY – Will a can of coke float? Experiment

The density of water will vary slightly depending on its temperature. So how do we make the coke float? With the can of Coke still submerged in the water. Since the density of the unopened can of Coke is fixed, the only thing we can change is the liquid in which to float the Coke. This liquid would need to have a specific gravity greater than the specific gravity of the can of Coke. What liquid can we use? So I will start adding containers of salt. Each container of salt is 26 oz 737g. It ended up taking 1…

VISCOSITY RACES investigating the flow of liquids experiment

WHAT YOU NEED ketchup , mustard, molasses, corn syrup, and spaghetti sauce, honey, bbq or any other liquids.   PROCEDURE Spread out a sheet or two of newspaper to make cleanup easier.   Put a small amount of ketchup and other liquids on the plate, being careful to keep them apart. If they end up touching it will not work. You are setting up the start line of a race between the different liquids.   Before you do the next step make a prediction on which liquid is going to win the race?   Now once you have all the…

How can you pour water down a string?

Water has some special properties, making it a very unique substance.   There are three forces at work in this experiment: gravity, adhesion, and cohesion. Gravity pulls the water down toward Earth. Adhesion attracts water to other objects. Cohesion attracts water molecules to other water molecules. In this experiment adhesion attracts the water to the string and cohesion keeps the water flowing in a steady stream.   Water molecule has two hydrogen atoms and one oxygen atom. These atoms end up having positive and negative charges, which cause them to stick to one another. This is why you see raindrops…

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