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What are the small bodies formed in an early stage of planet formation called?

Answer and explanation

Correct answer: Planetesimals

The direct answer is A: the small bodies were planetesimals. Planet formation begins in a disk of gas and dust around a young star. Dust grains collide and stick together, making larger solid pieces. These pieces grow into planetesimals. Gravity then helps planetesimals collide and accumulate into protoplanets and eventually planets. Option A is correct because planetesimals are recognized building blocks of planets. Option B is wrong because continents are large land areas formed on planets, not early space bodies. Option C is wrong because oceans are bodies of liquid water on planetary surfaces. Option D is wrong because “smoke rings” are not the scientific name for these objects. A useful chain is dust and grains → planetesimals → protoplanets → planets. Memory cue: planetesimals are the small planetary building blocks.

Related tags

GeographyPlanet-FormationPlanetesimals

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