Study the given table and answer the following.
| Name of planet | Revolving time around the sun | Temperature |
| A | 164 Years | -220°c |
| B | 365 Days | 15°c |
| C | 88 Days | -180°c to 420°c |
- Identify A, B and C.
- Which planet is farthest from the sun, Why?
- In which planet do you find the possibility of life? Give any three points to support your answer.
- Why is there vast difference in temperature in planet C?
1 Answer
1.
The planet A is Neptune, B is Earth and C is mercury.
2.
Among them Planet A is the farthest from the sun because its temperature is minimum among them.
3.
In planet B there is possibility of life because:
- There is suitable atmosphere for living organism.
- There is presence of water in its surface.
- Its surface temperature is only 15°c which is suitable.
4.
Planet C is Mercury. Here, one part of it is directed towards sunlight for long period and has the temperature up to about 420°c. The remaining part is extremely cold and its temperature reaches to -180°c. Hence, There is vast difference in temperature in planet C.
Things to remember from The Universe
- The solar system is a group of sun, eight planets, their satellites, comets, asteroids and meteors. The sun is at the center of which moves through the space taking its family members.
- The members of the solar system that revolve around the sun in closed elliptical orbit are called planets.
- The velocity so solar wind is about 500km/s.
- Inner planets: The planets which are found inside the belt of asteroids are called inner planets. They are mercury, Venus, earth and mars.
- Outer planets: The outer planets (sometimes called Jovian planets or gas giants) are huge planets swaddled in gas. They all have rings and all of plenty of moons each.
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