Fact file

ü The first seismograph was made in china .The earthquake made the balls from the pot fall into the mouths of the frogs below.

ü The moon always shows just one side of it to the earth. The moon pulls does. So we would find it very difficult to walk on moon. Unless we are weighed down, we would float.

ü Evaporating sea water is the oldest method of obtaining salt. Sun’s heat evaporates the water & salt is left behind. The salt thus obtained is further purified to make it edible.

ü In a microwave oven, water particles in the food are made to move very fast .heat produced due to the friction between these water particles cooks the food.

ü Dolphins have the best sense of hearing among animals. Their hearing is 14 times sharper than in human beings.

ü Snakes use their tongue to smell things.

ü Talk, a mineral found in talcum powder, is the softest mineral.

ü Shark teeth are actually modified scales.

ü The flying fish is anabas. It is able to leap through the air for long distances. It flies with the help of two wing-like fins attached to either side of its body

ü Insects breathe with the help of a series of tiny holes along the side of their bodies. These holes are called spiracles.

Durga Devi Sharma

 B.sc 2nd year