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:

Vestibular Organs

The sensory structures in the inner ear that are responsible for maintaining balance and spatial orientation by detecting changes in head movements.

Sensory Conflict Theory

An explanation of motion sickness in which the information from the eyes conflicts with the information from the vestibular senses, resulting in dizziness, nausea, and other physical discomfort.

Motion Sickness

A condition characterized by a feeling of nausea and, in some cases, dizziness, caused by movement during travel.

Vestibular Senses

The sensory system that contributes to balance and spatial orientation, located in the inner ear.