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Question
State three factors which have made life possible on the Earth and on no other planet.
Short/Brief Note
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Solution
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.
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RELATED QUESTIONS
Short Answer Question:
What is meant by Terrestrial Life?
Name the following:
Two planets which are nearer to the sun than the Earth.
Name the following:
The planet nearest to the Sun.
Give reasons for the following:
Mercury completes its orbit in less time than the Earth.
Why does the moon appear big in the sky though it is smaller than other heavenly bodies?
The shape of the earth is not exactly that of a sphere Why?
What is “Geoid”?
Who am I?
I turn around myself and revolve around the sun.
Who am I?
I am the nearest star to the earth.
Match the following.
| 1 | Asia | Vatican city |
| 2 | Africa | Amazon rainforest |
| 3 | Europe | Sahara desert |
| 4 | South America | Kangaroo |
| 5 | Australia | Biggest continent |
