In Which Phase of a Star's Life Are Thermonuclear Reactions

question 39

Multiple Choice

In which phase of a star's life are thermonuclear reactions converting hydrogen into helium in the core of a star?

• A) The main-sequence phase
• B) The horizontal branch phase
• C) As the star moves up the red-giant branch for the first time
• D) The protostar phase

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Definitions:

Existential Import

An attribute of propositions that implies the existence of the subject matter within logical or philosophical analysis.

Venn Diagram

A diagram using overlapping circles to visually represent relationships between different sets of items.

Proposition

A claim that presents a viewpoint or an assessment.

Venn Diagram

A diagram that uses circles to represent sets and their relationships to each other, illustrating intersections, unions, and complements among the sets.