Volcano

Things Required-

1. 6 cup flour 
2. 2 cup salt
3. 4 tea spoon cooking oil
4. 2 cup of water
5. Plastic soda bottle
6. Detergent
7. Red food coloring
8. Large tray
9.  2 Tea spoon baking soda
10. Vinegar

Procedure-

1. Mix first 4 ingredients and make a dough. This dough must be smooth and Firm.
2. Stand the soda bottle on the tray. Mold the dough around the bottle and shape it like a volcano. Leave mouth of  bottle.
3. Fill 1/3rd of bottle with warm water and add food coloring. Add 6 drop of detergent to the bottles (this helps control bubbles formed during the reaction)
4. add 2 teaspoon baking soda
5. now slowly put vinegar in the bottle

Tip- you can decorate the volcano to make it look beautiful in a fair or any other program by painting volcano or giving it a background 

How it works
Baking soda ( sodium bicarbonate ) reacts with vinegar (acetic acid) to form carbon dioxide  this carbon dioxide comes out in form of bubbles and we see a volcanic eruption.

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Electrostatic Force Experiment

Definition
electrostatic force refers to the force exerted by a body on other charger or uncharged body.

Things Required

• 2 plastic straws
• Thread
• Sheet of paper
• Tape

Procedure

• Tie one end of the thread with the straw 
• Then using tape hang it at edge of a table.

• Now rub the other straw with help of paper nicely for 2 minutes
• Bring it near the hanging straw

Observations

The straw rubbed with paper will attract the hanging straw

* Trick

If you will rub both the  straw a then they will repel each other

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