Astronomers Identify the Main Sequence on the H-R Diagram with What

question 24

Multiple Choice

Astronomers identify the main sequence on the H-R diagram with what activity in the course of a star's life?

• A) forming from a reservoir of cosmic material
• B) fusing hydrogen into helium in their cores
• C) letting go of a huge outer layer
• D) dying
• E) you can't fool me; so many stars are on the main sequence that there is no special stage in a star's life that can be identified with it

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Definitions:

Anorexia Nervosa

An eating disorder characterized by an abnormally low body weight, an intense fear of gaining weight, and a distorted perception of body weight or shape.

Hypokalemia

A medical condition characterized by lower-than-normal levels of potassium in the bloodstream, which can affect heart and muscular function.

Laxatives

Substances that promote bowel movements and are used to treat or prevent constipation, often by softening stools or increasing their passage through the bowels.