GED Science Practice

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Prepare for the GED Science Test with our comprehensive quizzes. Study with flashcards and multiple-choice questions, each providing hints and explanations. Ensure your success on the GED Science Exam!

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What is a star called when it ejects some of its material in the form of a cloud and becomes more luminous in the process?

Nuclear fission
Nearsightedness
Novelty
Nova

The correct answer is: Nova

A star that ejects some of its material in the form of a cloud and experiences an increase in brightness is referred to as a nova. In astronomical terms, a nova occurs in binary star systems where one of the stars is a white dwarf. The white dwarf accumulates gas and material from its companion star. Once enough material has been gathered on its surface, it triggers a thermonuclear explosion, resulting in a dramatic increase in luminosity. This event causes the star to shine brightly for a temporary period, which can last for weeks or months before it gradually fades back to its original state. The process of a nova is distinct from other astronomical phenomena and is specifically characterized by this ejection of material and change in brightness, highlighting the dynamic nature of stellar evolution.