Water don' falls

Materials you need. A glass, water, paper

Fill glass with water. Cover glass with the piece of paper. Hold the paper with hand ant turn glass with 180 degrees. Take your hand off the paper.

Water don't fall because air pressure push up the paper.

Floating ink

by Georgy and Ana Maria

Materials you will need: a glass with water, salt, ink, a spoon.

In the glass with water put a lot of salt and then mix it well. Over the water with salt put some ink.

The ink floating because its density is lower than salt water density.

Swirled Milk

by Melania and Andreea

Materials you will need: food Colouring, liquid dish soap, shallow pan/dish, whole milk (room temperature)

Put some milk into the pan. Allow the milk to come to room temperature. Add a few drops of different coloured food colouring into the pan of milk. Add a few drops of liquid dish soap into the pan of milk. Watch to see what happens.

The fat in the milk is broken down by the liquid soap. This causes the food colouring to swirl and make some really neat designs.

Soapy froth

by Daiana and Corina

Materials you will need: vinegar.a Bowl, washing powder

Take a spoonful of soap powder and place it in the bowl Add several drops of the vinegar onto the soap powder in the bowl.

This reaction becomes a bubbling froth that gives off carbon dioxide gas. Once it finishes frothing, it leaves behind a salt substance that is not edible (DO NOT eat this salt). This chemical reaction is caused by the vinegar acting as the acid and the soda is the base.

Shiny coins

by Miruna and Beatrice

Materials you will need: paper towel , lemon, knife, plastic cup or bowl, dirty/old copper coins

Cut the lemon ans fill the cup/bowl with some lemon juice. Put the dirty copper coins in the juice and let them soak for a few minutes. Remove the coins from the cup/bowl and place on the paper towel..

Oxygen in the air reacts with copper, making a copper oxide coating. This is what makes copper coins dirty. The acid in the lemon juice reacts with the oxide and removes it from the coins – making then shiny copper coin.