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The inner planets—Mercury, Venus, Earth, and Mars—are believed to have been formed by _____. 1. the explosion of supernovas 2. masses of cold hydrogen and helium 3. the combining of asteroid-sized debris
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The inner planets—Mercury, Venus, Earth, and Mars—are believed to have been formed by _____.

1. the explosion of supernovas
2. masses of cold hydrogen and helium
3. the combining of asteroid-sized debris
4.collisions with large galaxies

User Csuo
by
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1 Answer

4 votes

i believe the answer is B :/

User Newleaf
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