GK
SOLAR SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Rocky surfaces
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Orbit farther from the sun
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Larger orbits
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Deep, gaseous atmospheres
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Detailed explanation-1: -From top: Mercury, Venus, Earth and Mars. The planets Mercury, Venus, Earth, and Mars, are called terrestrial because they have a compact, rocky surface like Earth’s terra firma.
Detailed explanation-2: -The Terrestrial Planets The most abundant rocks, called silicates, are made of silicon and oxygen, and the most common metal is iron. We can tell from their densities (see Table 7.1. 2) that Mercury has the greatest proportion of metals (which are denser) and the Moon has the lowest.
Detailed explanation-3: -Terrestrial planets (Earth sized and smaller) are rocky worlds, composed of rock, silicate, water and/or carbon. To determine if some of these worlds have atmospheres, oceans or other signs of habitability, it takes more investigation.