Match the following events or labels to the given Hertzsprung-Russell diagram. The figure represents the pre main-sequence evolution of a low mass star. "A," "B," and "C" refer to the axes of the diagram. Use one letter for each question.
Correct Answer:
Q19: When a large gas cloud starts to
Q20: As the protostar contracts gravitationally, it will
Q21: How do large mass stars in the
Q22: Pre-main sequence stars (not protostars) on the
Q23: What istheresistanceofagastotheflowofradiation?
A) degeneracy
B) conduction
C) opacity
D) hydrostatic pressure
E)
Q25: Describe the concept of a "birth line"
Q26: Energy flows by radiation or convection inside
Q27: The nuclear reactions in a star's core
Q28: When a large gas cloud starts to
Q29: Star clusters are important to the study
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