Why is the Earth Planet rocky?
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Because they are made up of rocks and metals and have solid surfaces.
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as we know that in Earth there is a 70% water and something are soluble in water. as we all know that rock is a hard material that cannot dissolve in water and survive in extreme conditions also. due to this the earth planet Rocky and the second reason is we hear about the big bang in the solar system in which big asteroid then our sun hated it and form nine planets. the sun is made of rocks and burn that due to hydrogen after the Big Bang the nine planets all are formed with rocks but some have more rocks and some have less
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