INDICATER!!

Acid or Base??


Materials:
15ml unsweetened grape juice
Water
1 Teaspoon baking soda
Vinegar
3 glasses

Instructions

Line up the three glasses in a line.


Pour water into the 1st glass, baking soda into the second glass and vinegar into the third glass.


Now, add some unsweetened grape juice to all the glasses.


Observe: Water gets the colour of the grape juice, which means water is neutral. When grape juice is added to baking soda the colour changes into green indicating it is a base. When the juice is added to vinegar the colour changes to red indicating it is an acid

THE STUCK CUP!!!!!

Can you stick a cup to your hand? Lets see!!


Materials:
A lightweight cup with 2-in. (5cm) base (the cup must have low,circular,bowl shaped depression in thee bottom)
A clean towel
A sponge
Water

Instructions

Place the cup upside down on the towel.

Moisten your left palm with the sponge and water. Your palm should feel moist but not wet.

Place your left palm firmly on the cup's bottom. Rub the back of your left hand. Lean slightly forward as you rub to apply quite a bit of force to your left hand, and after a few minutes lift up your hand........... THE CUP STUCK TO YOUR HAND!!!

After a few moments it comes off