Leak Proof Bag

I chose this experiment because I wanted to see that there would be no water leaking out of the baggie when I poked holes with the baggie with water.

The reason why this experiment worked is because the baggie is made out of polymers which are long chains of molecules. When I poked the pencils through the baggie, they slip between these polymers. The molecules seal around the pencil, making water not to leak.

www.SteveSpanglerScience.com

Invisable Ink

I chose this experiment because I thought It would be neat to see a message appear with just lemon juice and the warmth of a light bulb.

Th reason why this experiment worked is because the lemon juice is an acid. When the acid from the lemon juice is heated by the light bulb, darkness more quickly than the paper.


www.sciencesplat.com

Center of a Cork

I chose this experiment because I wanted to see the cork float to the side of the glass of water and then to the middle by adding more water and what caused it to do this.


The reason why this experiment worked is because when the glass was filled almost full and I putting the cork in, it affected the surface tension, causing the cork to float to the side of the glass. When I added more water slowly to the brim of the glass and over flowing, the water created a convex tension or higher level, the cork floated to the highest level which was in the center of the water. The convex tension is like a half moon shape, being higher in the middle.


www.sciencefair-projects.org

Rise Above

I chose this experiment because I thought it would be interesting to see the food coloring separate from the salt water, after all the mixtures were mixed together.


The reason why this experiment worked is because that the salt water is heavier than the food coloring, which is lighter. The salt water went to the bottom of the cuo and the food coloring went to the top.

www.kids-science-experiments.com

Flubber Chicken Bone

I chose this experiment because I wanted to see the chicken bone start out being hard then turn soft, flubbery.

The reason why this experiment worked is because the bone is made up of calcium which makes the bone hard like human bones. When I put the bone in the vinegar for about one week, the bone got soft. The vinegar is a mild acid and over time it dissolved the calcium which made the bone soft.


www.sciencebob.com

The Layer Float

I chose this experiment because I wanted to see the three layers of the honey, oil, and water separate into their own layers and to see the three objects the coin, grape, and cork go to each of the layers.

The reason why this experiment worked is because, when I put the honey, oil, and water in the jar, in this order, I was putting the heaviest to lightest weight (density) of each. They each formed their own layers.

When I dropped in the coin, grape, and cork in this order, the coin is the heaviest to the cork being the lightest. Each object went to the layer of the same weight, (density) as its own.

Honey and Coin - heaviest- went to bottom
Oil and Grape - a little lighter - stayed in the middle
Water and Cork - lightest - stayed on top.

www. kids-science-experiments.com