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प्रश्न
State three factors which have made life possible on the Earth and on no other planet.
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उत्तर
The factors which have made life possible on earth and on no other planet are as follows :
- Earth is the only planet in the Solar System which is neither too hot nor too cold.
- The atmospheric blanket around the earth protects it from ultra-violet and other deadly sun rays.
- The mixture of gases in the atmosphere is suited to the growth and survival of life.
- Plants, through the process of photosynthesis, take away carbon dioxide from the atmosphere and make oxygen available for animals to breathe.
- 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.
- Circulation of many life cycles not make energy and food available but also process the wastes which otherwise would harm life.
संबंधित प्रश्न
Short Answer Question:
Name the two sources of heat in the interior of the earth.
Short Answer Question:
What are the Jovian planets? Name them.
Short Answer Question:
How big is the sun? Describe its size with respect to the earth.
What heavenly bodies are the members of the Solar System?
Why is the following planet not inhabitable?
Neptune
Which is the unit adopted for measuring the distance in the Universe? Give a reason for its choice.
Give reasons for the following:
Mercury completes its orbit in less time than the Earth.
Who am I?
I am the nearest star to the earth.
How many continents are there on the earth?
Name the continents of the world.
