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Which main process begins to produce energy in a protostar?

Answer and explanation

Correct answer: Gravitational contraction

In a protostar, the main energy source is gravitational contraction. As the cloud contracts, gravitational potential energy is converted into heat. Nuclear fusion begins only after the core reaches sufficiently high temperature and pressure, marking the main-sequence stage. Exam tip: associate protostars with contraction and mature stars with fusion.

Related tags

GeographyEarth OriginStar FormationProtostarGravitational ContractionSolar SystemFormation Of PlanetsAnd Our Solar SystemStar Formation Formation Of Planets And Our Solar System

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