# Atal Tinkering Labs ATL

## Refraction of Light with a arrow experiment

A pencil is placed with a diagonal orientation within a 2/3-filled glass of water. At the surface of the water, the pencil appears to be misaligned or broken; the portion of the pencil above the water is shifted relative to the image viewed under the water. The bending of the path of light as it passes from the water to air causes the observed distortion of the image of the pencil.   Next, I poured water into a glass and placed an arrow on a piece of paper about 4 to 5 inches (10-12 cm) behind the glass of water….

## Why sunsets are Red & Yellow? Experiment

Milk is a colloid, which contains tiny particles of fat and protein. Mixed with water, the particles scatter light much as dust scatters light in the atmosphere. Light is scattered differently, depending on its color or wavelength. Blue light is scattered the most, while orange and red light are scattered the least.   Light travels in a straight line until it encounters particles, which deflect or scatter it. In pure air or water, you can’t see a beam of light and it travels along a straight path. When there are particles in the air or water, like dust or ash…

## Swim Cap Trick Experiment

How to Put on a Swim Cap Without Pulling Your Hair   Most swim caps are made of either latex or silicone, which tend to stick to dry hair. Putting on a swim cap without pulling or snagging hair is a challenge.   Suggestions stretch it wide, Get your hair wet Have a friend help Try a different cap   Well I heard you could put on a swimming cap by having someone drop it on your head full of water would work. So I had my 2 nieces come help me out. Some how I was voted in as…

## The Drip Temperature experiment!

Which runs faster: hot or cold water? Hot runs faster because you can’t catch a hot, but you can catch a cold. What Happens: The pin holes on the bottom of each cup are the same size, you’ll see that the hot water drips faster then the cold water. If the cold water is cold enough it may even stop, like it did in this demo. The cold actually stop dripping for a couple seconds.   Why: Molecules exist although we can’t see them. The molecules in hot water move faster then in cold water. The faster the move, the…

## Bernoulli’s principle Ball in stream of water experiment

A mathematician called Bernoulli found that areas where fast moving fluids are present have a lower pressure than the surrounding environment. Furthermore, he found that water running over a curved surface of also exhibits the same low pressure, the faster the water the lower the pressure.   So, why did the ball move toward the water stream? Fluids (and air) want to move from high pressure areas into low pressure areas. You created a situation where the wet side of the ball had lower pressure compared to the dry side of the ball. The high air pressure on the dry…

## The Fascinating Oscillating Reaction Kit experiment

In this one-of-a-kind chemistry kit, you will make a clear solution and watch it change to yellow, then to blue-purple and back to colorless. Its amazing to watch the colors repeat the color cycle again and again.   The REGULAR KITS (singles) include enough materials for repeating each experiment two to three times. The larger CLASSROOM KITS contain five times the materials of the single kits, enough for a five STATION CLASSROOM SETUP that can be REPEATED APPROXIMATELY three TIMES.   There are many reactions going on at the same time. I’m going to try to simplify it as the…

## Water Bottle Pressure Smoke

This is a great hands-on experiment to show kids. Make sure to wear safety glasses, as the pressure inside the bottle makes the cap fly very far. Also do not point the bottle at anyone.   This experiment will show you how to make steam come out of a water bottle without heating it. A simple and fun and easy pressure experiment is awesome.   When you squeeze the bottle, the pressure increases. This causes the temperature inside the bottle to rise. When you release the bottle, the pressure decreases. This causes the temperature inside the bottle to fall and…

## Is HOT water less dense then COLD water Experiment

To discover the difference in density between hot and cold water.   Procedure Fill one balloon with hot water from the tap. Fill a second balloon with cold water Fill tank with hot water from tap   Explanation The balloon filled with hot water will float and the balloon filled with cold water will sink! This happens because cold water is denser than hot water. As water is heated, it molecules move faster. This causes the molecules to spread apart from one another, causing the density of the water to decrease. as water cools, its molecules move slower. This causes…

## Walking on Water Experiment

Walking on Water. Have you ever wondered if you could walk on water. Well we did and decided to try this experiment. We ran a couple different experiments.   First experiment one walking/jogging in with bare feet.   Second experiment we duck tape boogie boards to our feet to see if that would help.

## Overflowing ice cube experiment

Fill a glass with water and then add ice cubes so that they are sticking out above the brim of the glass. Make sure all ice cubes are floating in the water.   Observe what happens to the water level when the ice cubes melt. Does the water level overflow?   Explantation This is a classic experiment with intriguing results. Observation reveals that the water will not over flow, even though the ice was initially above the top of the glass.   IF you freeze a glass of water, the ice will rise about the top of the brim because…

## The Incredible Rising Mustard Experiment

Discover what happens when baking soda is added to mustard? 1.) Pour some mustard into the clear cup. The amount is not crucial. 2.) Add 1 teaspoon of baking soda to the cup and stir briefly. 3.) Stop stirring and observe   Explanation The mustard will rise in a dramatic fashion due to the presence of vinegar in mustard. The reaction between the vinegar and baking soda will produce carbon dioxide gas, which causes the mustard to rise.   The reaction will continue until all of the vinegar is used up. In this case, the baking soda will be in…

## What color is Iodine? Experiment

To demonstrate that iodine is more soluble in oil then in than in water. 1.) Fill the bottle about ½ full of water and add iodine until it is about the color of tea. 2.) Hold it up and slowly add an small amount of oil so that the you can see the clear oil on top of the brown-colored water. 3.) Tighten the cap and shake for about 30 seconds. The two layers will need a few moments to form. The bottom layer will be much lighter and the top will be a beautiful purple color.   Explanation This…

## Why do your fingers wrinkle more in fresh water than in salt? Experiment

To discover what causes your hands to get wrinkly in water. 1.) Make a saturated salt solution by dissolving as much salt as you can in a cup of water. Fill another cup with fresh water from the tap. 2.) Submerge one hand in the salt water and the other in fresh water fro 20 minutes. Observer both hands.   Explanation You should notice that your hands gets wrinkly from soaking in freshwater, just like being in the bathtub. However, the hand that was soaking in salt water will not be wrinkly at all! Every cell in the skin of…

## Neutral Buoyancy experiments

1.) Fill the cup about halfway with alcohol. 2.) Add several drops of olive oil to the alcohol. They will form distinct little spheres and sink to the bottom. 3.) Add water drop by drop until the balls of olive oil rise and become suspended in the middle of the water-alcohol solution.   Explanation: The olive oil initially sinks because it is denser than the alcohol. However, it is less dense than water. By adding water to the alcohol, the density of the alcohol-water solution is gradually increased, until it becomes equal to that of the olive oil. At this…

## FUN WITH TONIC WATER & BLACK LIGHT EXPERIMENT

Objective: TO observe the fluorescent nature of tonic water, and how to quench it.   Materials: * Tonic water (must contain quinine) Clear cup Black light Salt   Safety Precautions: Perform only under adult supervision. Do not start at the black light, as ultraviolet lights can be harmful to your eyes.   Procedure: Completely darken the room and pour the tonic water into a cup under the black light. Add salt to the tonic water, while it is still under the black light.   Explanation: The tonic water contains quinine, which is highly fluorescent compound. Black light gives off ultraviolet…

## Reusable Cold Pack experiment

Objective: TO understand the concept of freezing point depression by making a reusable cold pack.   Materials: Quart freezer bag Isopropyl rubbing alcohol Food coloring (Optional)   Safety Precautions: Isopropyl alcohol is poisonous if ingested. Be sure to clearly label the bag “POISON” before putting it into the freezer.   Procedure: Add 2 cups of water and 1 cup of rubbing alcohol to a freezer bag and seal. Place in the freezer overnight. Observe the bag   Explanation The solution in the bag will not freeze, because alcohol has a much lower freezing point then water. Isopropyl alcohol freezes at…

## How Disappearing INK works Experiment

Objective: To discover how disappearing ink works.   Materials: * Bottle of disappearing ink – available at magic or novelty stores Link * Clear plastic cup * Seltzer water – or other acidic liquid such as vinegar or lemon juice * Ammonia   Safety Precautions: Disappearing ink is toxic if ingested. Ammonia is also tonic if ingested. Do not inhale ammonia fumes. Do in a well ventilated area.   Procedure: Squirt some disappearing ink on a white shirt. It will turn clear in a short time. Add a little disappearing ink to a clear cup. Next, add a little Seltzer…

## 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….