Which Is Used Observationally to Determine the Age of a Star

question 38

Multiple Choice

Which is used observationally to determine the age of a star cluster?

• A) the total number of main- sequence stars
• B) the amount of dust that lies around the cluster
• C) the ratio of giants to supergiants
• D) the luminosity of the main- sequence turn- off point
• E) the number of white dwarfs

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Definitions:

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A vaccine used to provide immunity against tetanus, a bacterial infection.

Infectious Bite

A wound inflicted by an animal or human that introduces pathogens, potentially leading to infection or disease.

Spider Bite

A wound resulting from the bite of a spider, which can vary in symptoms from mild to severe, depending on the species and the individual's reaction to the venom.

Tetanus Toxoid

A vaccine used to provide immunity against tetanus by inducing the body to produce antibodies against the tetanus toxin.