All Stars Are Born with the Same Basic Composition, Yet

question 5

Multiple Choice

All stars are born with the same basic composition, yet stars can look quite different from one another. Which two factors primarily determine the characteristics of a star?

• A) Its mass and its stage of life
• B) Its apparent brightness and its distance
• C) Its age and its location in the galaxy
• D) Its mass and its surface temperature
• E) Its apparent brightness and its luminosity

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Definitions:

Probability Density Function

A mathematical expression that represents how likely it is for a random variable to assume a specific value.

Continuous Random Variable

A random variable that can take any value within a given range, including fractions and decimals.

Positive Value

A number greater than zero.

Z

Often referred to in statistics as a standard score, it represents the number of standard deviations a data point is from the mean.