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 …
How do the bees make honey? The bees suck the nectar from the flowers and swallow them. Special enzymes in the bees, act on the nectar whereby the sugars …
