The bouncy, transparent eggsperiment.

Did you ever try to bounce an egg? Don't! Not until you read through this experiment, anyway.

This experiment is more fun if you do it with a couple of friends, because you can have a bouncing egg contest when you've finished it. So round up a couple of pals, a dozen eggs or so, and let's get started.

What Do you need to perform this experiment?

• 2 glass jars or plastic containers with covers
• 1 raw egg
• 1 hardboiled egg
• vinegar (enough to cover both eggs)

How to do it?

Place your raw egg in a jar and cover it with vinegar. You will notice the reaction of the egg shell with calcium carbonate and vinegar.  It will bubble for the first day (as above) The second day you need to change the vinegar. After 48 hours we carefully rinsed the raw egg and noticed it was transparent! Cool! Isn't it amazing? Basically it is an egg without a shell! 

Here you can see that it is flexible because of the membrane.  The membrane thickens with the vinegar and holds the raw egg together. 

The Naked raw egg bounces,  but don't bounce too high or too hard or you'll have an egg splatted on the countertop.

Invisible Ink Experiment

Did you know you can make great invisible ink from lemon juice?

Doing 'The invisible Ink Experiment' is very easy 

What Do you need to perform this experiment?

• Lemon Juice
• Q-tip
• Paper
• Matchstick
• Candle

How to do it?

Simply squeeze a lemon and use the juice to write a message on a piece of white paper. I don't have a dip pen so just ended up using a q-tip (cotton bud).

To reveal the message all you have to do is hold it up to a heat source (you can see the results in the image below). You can use a lightbulb, iron (no steam) or candle for example.

Warning: PLEASE do it under supervision.

Science Experiment: The Great Foamy Mountain

What do you need to perform this experiment?

A clean 16 ounce plastic soda bottle

• 1/2 cup 20-volume hydrogen peroxide liquid (20-volume is a 6% solution, ask an adult to get this from a beauty supply store or hair salon)
• 1 Tablespoon (one packet) of dry yeast
• 3 Tablespoons of warm water
• Liquid dish washing soap
• Food coloring
• Small cup
• Safety goggles

          What to do ?

NOTE: As you can see from the picture, foam will overflow from the bottle, so be sure to do this experiment on a washable surface, or place the bottle on a tray.

1. Hydrogen peroxide can irritate skin and eyes, so put on those safety goggles and ask an adult to carefully pour the hydrogen peroxide into the bottle.

2. Add 8 drops of your favorite food coloring into the bottle. 

3. Add about 1 tablespoon of liquid dish soap into the bottle and swish the bottle around a bit to mix it. 

4. In a separate small cup, combine the warm water and the yeast together and mix for about 30 seconds.

5. Now the adventure starts! Pour the yeast water mixture into the bottle (a funnel helps here) and watch the foaminess begin!

How this works?

Foam is awesome! The foam you made is special because each tiny foam bubble is filled with oxygen. The yeast acted as a catalyst (a helper) to remove the oxygen from the hydrogen peroxide. Since it did this very fast, it created lots and lots of bubbles. Did you notice the bottle got warm. Your experiment created a reaction called an Exothermic Reaction - that means it not only created foam, it created heat! The foam produced is just water, soap, and oxygen so you can clean it up with a sponge and pour any extra liquid left in the bottle down the drain.

This experiment is sometimes called "Elephant's Toothpaste" because it looks like toothpaste coming out of a tube, but don't get the foam in your mouth!

          Question for you 

           1. Does the amount of yeast change the amount of foam produced?

           2. Does the experiment work as well if you add the dry yeast without mixing it with water?

           3. Does the size of the bottle affect the amount of foam produced?