What best describes a protostar?

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Prepare for the CSET Multiple Subjects Subtest 2. Dive into math and science with flashcards and multiple choice questions, each question offering hints and explanations. Gear up for your success!

Multiple Choice

What best describes a protostar?

Explanation:
Stars form when a region of gas in a nebula collapses under gravity. As it contracts, gravitational energy turns into heat in the core, creating a protostar. The key moment is when the core becomes hot enough for hydrogen fusion to begin, igniting the nuclear reactions that will power the star. So a protostar is a contracting nebula on track to ignite fusion and become a true star. It isn’t a mature main-sequence star, a planet’s satellite, or a dying star.

Stars form when a region of gas in a nebula collapses under gravity. As it contracts, gravitational energy turns into heat in the core, creating a protostar. The key moment is when the core becomes hot enough for hydrogen fusion to begin, igniting the nuclear reactions that will power the star. So a protostar is a contracting nebula on track to ignite fusion and become a true star. It isn’t a mature main-sequence star, a planet’s satellite, or a dying star.

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