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:

Opportunity Costs

Letting go of possible advantages in other alternatives when favoring one.

Scarce Resources

Resources that are limited in availability and can be depleted, which necessitates efficient utilization and management.

Economic Thinking

A way of analyzing problems by considering the costs and benefits of different choices and actions.

Opportunity Cost

The cost of forgoing the next best alternative when making a decision, representing what is lost when one choice is made over another.