Concentric Domes

- 600 g water

- 200 g liquid dishwashing soap

- 100 g glycerin

- a straw

- a perfectly flat surface (glass, plastic or steel)

1. Wet the work surface
2. Insert the straw into the soapy solution, blow through the straw forming a bubble and place it on the wet surface
3. Insert the straw into soap, water well even the external part of the straw, then very gently insert the straw in the first balloon and blow forming a second balloon
4. Proceed in the same way a third time (act very carefully, so that each newly formed balloon touches the previous one)



So what's going on? Each balloon is positioned in the center of the previous
There is air inside the balloon, placing an air bubble moves the air of the previous one, which increases due to the  elasticity of the soap. During the experiment, especially in case of failures you will remember how many compositions you can do with such balloons supported on a surface and you will also check the limit of expansion for the soap mixture.

Lava In A Cup

-A clear drinking glass

-1/4 cup vegetable oil
-1 teaspoon salt
-water
-Food coloring (optional) 

1.Fill the glass about 3/4 full of water.
2.Add about 5 drops of food coloring - I like red for the lava look.
3. Slowly pour the vegetable oil into the glass. See how the oil floats on top - cool huh? It gets better
4.Now the fun part-Sprinkle the salt on top of the oil.
5.Watch blobs of lava move up and down in your glass!
6.If you liked that, add another teaspoon of salt to keep the effect going.

So what's going on? Of course, it's not real lava but it does look a bit like a lava lamp your parents may have had. First of all, the oil floats on top of the water because it is lighter than the water. Since the salt is heavier than oil, it sinks down into the water and takes some oil with it, but then the salt dissolves and back up goes the oil!

MR. BOGDAN COPIL FROM THE INTERNATIONAL SCHOOL OF BUCHAREST (ISB)

HIS EXPLANATION OF AN EXPERIMENT:

Effects Of Brine





-Fine Salt

-A Large Glass

-An Egg

-A Spoon

-Water

1. Pour water into the cup until it fills up half of it and then slowly put the egg in with a spoon.

Egg goes to the bottom of the cup.

2. Take the egg out of water and put in it ten tablespoons of salt, mix them with water and get brine.  Then, insert the egg again.

The egg floats.

3.Take the egg out of water and pour water until the glass is filled. Place the egg into the cup. The egg remains in the middle of the glass.

The egg is denser than water so it sinks, but salt water is denser than fresh water and therefore enables the egg to float. In the last experiment, fresh water floats above the salt water because it has a lower density; egg cup remains half being denser than fresh water and less dense than salt water.



Cooked Or Raw?

-A PLATE

-TWO EGGS

-A PAN

-WATER

1.BOIL AN EGG FOR ABOUT 8 MINS. AFTER IT COOLS, ASK A FRIEND TO DISCERN A RAW EGG FROM A BOILED EGG

2. ROLL 2 BALLS ON A PLATE

3. STOP THEM BY TOUCHING THEM QUICKLY WITH YOUR FINGERS

• ONE OF THE 2 EGGS STOPS, WHILE THE OTHER ONE CONTINUES SPINNING

THE EGG THAT KEEPS SWIRLING IS RAW. INSIDE THE WHITE AND YELLOW YOLK CONTINUE TO SPIN EVEN AFTER YOU TOUCH THEM. IF YOU STOP TOUCHING IT, IT WILL START TO SPIN AGAIN.

Blobs is a Glass

-A clean glass/bottle                                    

-3/4 cup of water

-Vegetable Oil

-Fizzing tablets

-Food coloring

1. Pour the water into the bottle.

2. Use a measuring cup or funnel to slowly pour the vegetable oil into the bottle until it's almost full. You may have to wait a few minutes for the oil and water separate.
3. Add 10 drops of food coloring to the bottle (we like red, but any color will look great.) The drops will pass through the oil and then mix with the water below.

4. To keep the effect going, just add another tablet piece. For a true lava lamp effect, shine a flashlight through the bottom of the bottle.

To begin, the oil stays above the water because the oil is lighter than the water or, more specifically, less dense than water. The oil and water do not mix because of something called "intermolecular polarity." That term is fun to bring up in dinner conversation. Molecular polarity basically means that water molecules are attracted to other water molecules. They get along fine, and can loosely bond together (drops.) This is similar to magnets that are attracted to each other. Oil molecules are attracted to other oil molecules, they get along fine as well. But the structures of the two molecules do not allow them to bond together. Of course, there’s a lot more fancy scientific language to describe density and molecular polarity, but maybe now you’ll at least look at that vinegrette salad dessing in a whole new way.

When you added the tablet piece, it sank to the bottom and started dissolving and creating a gas. As the gas bubbles rose, they took some of the colored water with them. When the blob of water reached the top, the gas      escaped and down went the water.