Question

State three factors which have made life possible on the Earth and on no other planet.

Answer 1

The factors which have made life possible on earth and on no other planet are as follows :

1. Earth is the only planet in the Solar System which is neither too hot nor too cold.
2. The atmospheric blanket around the earth protects it from ultra-violet and other deadly sun rays.
3. The mixture of gases in the atmosphere is suited to the growth and survival of life.
4. Plants, through the process of photosynthesis, take away carbon dioxide from the atmosphere and make oxygen available for animals to breathe.
5. Oceans play a great supporting role. They cover three-fourths of the earths surface and are responsible for the operation of the hydrological cycle which makes water on land surface available.
6. Circulation of many life cycles not make energy and food available but also process the wastes which otherwise would harm life.