Category: Important Questions
How is fog formed? Fog often forms after sunset, on days with clear skies and no wind. At night when the surface of earth cools off, it cools the …
How can the pine cones be used to make weather forecasts? Pine cones are very reliable weather indicators. When their scales dry up and scales dry up and open …
How do the CFCs cause the breakdown of Ozone? When the CFCs are released in the atmosphere, they reach the Ozone layer. The ultraviolet radiation strikes the CFC and …
Now do we know that the galaxies are moving away from one another? Application of the Doppler effect to the light waves has helped us to know that the …
How can you identify Mars on a clear night? Mars is only planet which appears red-dish in colour. That is why it is also known as the ‘red planet’. …
How do the Deer shed their antlers? The Deer shed their antlers every winter and grow a new pair every spring. These antlers are covered with a fine skin …
How many types of teeth are there? The shape and the type of teeth depends upon the natural diet of the animal. Human beings tree types of teeth – …
How do the fish living at the sea survive? Fish that live in deep sea water are adapted to a life without sun-light and green plants. They feed mainly …
