How Do Observations of Galaxies at Different Distances Help Us

question 135

Multiple Choice

How do observations of galaxies at different distances help us learn about galaxy evolution?

• A) Observations of different distances show galaxies of different ages and therefore different stages of evolution.
• B) Observations of the most distant galaxies will allow us to observe the birth of galaxies.
• C) We can observe the evolution of a single galaxy over time.
• D) We can observe galaxies at different distances merge, helping us learn how mergers affect evolution.
• E) We can see what our galaxy used to look like over time, helping us theorize about the physical processes that led to its current appearance.

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Definitions:

Sample Variances

A measure of the spread or dispersion of a set of sample data points.

Test Statistic

A value calculated from sample data during a hypothesis test used to determine whether to reject the null hypothesis.

F-distribution

The F-distribution is a probability distribution that arises in the analysis of variances for comparing the variances of two or more samples.

F-distribution

A probability distribution that arises in the analysis of variances for comparing variances between samples.