UNIVERSE
SOLAR SYSTEM FORMATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They formed by the merging of planetesimals in the inner part of the main disk.
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They are composed of elements that did not vaporize.
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They formed by the merging of icy planetesimals near the outer part of the main disk.
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They are rocky and dense.
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Detailed explanation-1: -Which of the following is true of the terrestrial planets? They have solid surfaces.
Detailed explanation-2: -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.
Detailed explanation-3: -In general, terrestrial (rocky) planets are denser than the gas and ice giants. Earth has a density of around 5.5 g/cm3 compared with Jupiter’s density of 1.3 g/cm3.
Detailed explanation-4: -The terrestrial planets are rocky because they are earth-like and are made up of rocks and metals and have relatively high densities. Terrestial planets are similar to earth in composition heat from the sun evaporated lightweight elements like hydrogen, helium into interplanetary space.