Tag: How to Questions
How does the Ozone layer protect us? The Ozone layer is a layer of gases occurring about 10 to 50 km above the earth’s surface. It absorbs most of …
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 – …
