The Classification of Stellar Spectra Started with the Amount of Hydrogen

question 27

Multiple Choice

The classification of stellar spectra started with the amount of hydrogen in the star's spectrum; however, now a better scheme uses the star's _____.

• A) mass
• B) diameter
• C) radius
• D) temperature
• E) luminosity

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Definitions:

Negative Expectations

Anticipatory beliefs or thoughts that lead to experiencing negative outcomes because one unconsciously conforms their behavior to those beliefs.

Surgical Procedure

A medical operation involving the cutting of body tissues or organs to repair or remove a part of the body or to diagnose a condition.

Sensory Adaptation

A reduction in sensitivity to a stimulus after constant exposure to it, allowing organisms to focus on changes in their environment.

Weber's Law

A principle stating that the smallest noticeable difference in stimulus intensity is proportional to the intensity of the original stimulus.