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Earth as a Planet — Geography STD 9 — Question

ICSE BoardEnglish MediumSTD 9GeographyEarth as a Planet4 Marks
Question
Why is the following planet not inhabitable?
Mercury
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Answer

Mercury is not inhabitable due to the following reasons:
  1. 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.
  2. 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.
  3. There’ is a very little atmosphere and no .water on this planet. The atmospheric envelope is so thin that Mercury’s world is airless.

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