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प्रश्न
Why is the following planet not inhabitable?
Mercury
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उत्तर
Mercury is not inhabitable due to the following reasons:
- A part of it turned towards the Sun is always in sunlight. There it is a continuous long day. The temperature reaches 450°C in this hottest part. It experiences a perpetual summer.
- Its other side is always turned away from the Sun. There is a continuous night on this side. It is like perpetual winter, the temperature going 150°C below freezing point. Therefore, the diurnal range of temperature is very high.
- There’ is a very little atmosphere and no .water on this planet. The atmospheric envelope is so thin that Mercury’s world is airless.
संबंधित प्रश्न
Study the picture and answer the questions that follow.

(a) What does the picture show you about the earth?
(b) State briefly the Bedford Level Experiment.
(c) The sun rises and sets at different times in different places. What does the statement show the shape of the earth?
(d) In what way is the earth’s atmosphere beneficial to mankind?
Which planet is known as ‘blue planet’?
Which is the brightest planet?
State three factors which have made life possible on the Earth and on no other planet.
Give reasons for the following:
Comets appear very rarely.
Describe the position of the Earth in the Solar System.
What information do man-made satellites provide?
How did the Earth form?
Day and night are caused due to the earth’s _______
How many continents are there on the earth?
