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...

Flipping the Image Materials Required: The Jack of Spades or the Jack of Hearts from a deck of cards Glass of water Transparent glass or Plastic rod Paper and pencil Did you know that the Jack on a playing card can do an about turn mysteriously, while a rod meant for stirring, can change the meaning of a sentence. A deck of cards has two one-eyed Jacks – the Jack of...

Extracting Salt from Water Ocean water is salty. So if you were out on the ocean in a little boat and were thirsty, you would not be able to drink the salty ocean water. The salt in it will make one feel thirstier. In some places around the world, oceans dried up long ago and left the salt behind. You can show how salt is left, when the salt water evaporates....

How Soil Erodes What happens if you water a flower bed, without attaching a sprinkler on the end of the garden hose? The soil will probably scatter out of the bed, leaving big holes behind. This is why people use sprinkling cans and hoses to water flower pots and gardens. “Erosion” is the process by which soil is washed away from the surface of the earth, by the action of water....