GK
SOLAR SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Earth revolves slowly enough for seasons to occur.
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Earth is large enough to sustain a variety of species.
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Earth has an atmosphere to filter and trap energy from the sun.
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Earth rotates fast enough for gravity to hold objects on its surface.
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Detailed explanation-1: -Of all the planets in the Solar System, Earth is the only one on which life exists. Which of the following best describes a factor that allows Earth to support life, while other planets are unable to do so? Earth is large enough to sustain a variety of species.
Detailed explanation-2: -But in recent years, scientists have become convinced that the minute moon is about as likely to harbor life as Europa, for largely the same reason-it appears to contain a liquid water ocean under a cover of ice.
Detailed explanation-3: -A planet is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighbourhood around its orbit.