ISAT Science Grade 11 Practice Questions - Idaho Standards Achievement Test (ISAT) Science - Grade 11 Exam

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Most elements heavier than helium in the early universe were produced by stellar nucleosynthesis. Which statement best describes that process?

Heavier elements form only by chemical bonding on planetary surfaces Stars fuse lighter nuclei into heavier nuclei under extreme core conditions All heavy elements formed instantly at the moment of the Big Bang Cosmic rays convert protons into lead through single collisions

Correct Answer:

Stars fuse lighter nuclei into heavier nuclei under extreme core conditions

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