Heat and Smell   Materials Required: A pet cat or dog Pet food Three feeding bowls Plastic food wrap A sunny window Refrigerator People prefer to eat food at varying temperatures. We eat cold ice cream, room-temperature peanut butter, jelly sandwiches and hot hamburgers. Pet cats and dogs usually eat their food at room temperature. Will they eat their food, if it is cold? Will they eat it, if it is...

Hanging Water Materials Required: A paper or plastic cup A sheet of paper A sharp pencil A well-known experiment can be switched around. The known experiment involves placing a sheet of paper over a glass, which is half-full of water. Then, a palm is placed on top of the sheet of paper. The glass is turned upside down. The palm is removed carefully. You will observe that air pressure keeps the...

Freezing the Gases Materials Required: Two identical cans of Soda Two large drinking glasses Use of freezer Have you ever had a “flat” soda? A flat soda is one that has lost its fizz and does not bubble anymore. Bubbles are added to make the soda taste better. Carbon dioxide is the gas from which the bubbles arise. As long as the cap is screwed on the soda bottle tight, or...

Flowing Down the String Materials Required: A piece of string one foot (33 cms) long A glass of water A small pitcher Are you aware that water can flow along a string as if it was a tube?  Soak the string in water. Fill half the pitcher with water and tie one end of the string to the pitcher.  The string should be pulled tightly over the spout of the pitcher...