Although We Know Less About Dark Matter in Elliptical Galaxies

question 101

Multiple Choice

Although we know less about dark matter in elliptical galaxies than in spiral galaxies,what does current evidence suggest?

• A)Elliptical galaxies probably contain about the same proportion of their mass in the form of dark matter as do spiral galaxies.
• B)Elliptical galaxies probably contain far less dark matter than spiral galaxies.
• C)Elliptical galaxies probably contain far more dark matter than spiral galaxies.
• D)Unlike the broad distribution of dark matter in spiral galaxies,elliptical galaxies probably contain dark matter only near their centers.

Understand how to compute and the implications of descriptive measures of central tendency and variability.

Understand the concept of distribution skewness and its impact on mean and median.

Understand how histograms represent data distribution and the role of mean in symmetric and skewed distributions.

Understand errors and discrepancies in data analysis, including misinterpretations of mean and median.

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Definitions:

Chlorine

A chemical element with symbol Cl and atomic number 17, known for its high reactivity and use as a disinfectant.

Ionic Compound

A chemical compound comprising ions held together by electrostatic forces termed ionic bonding.

Lewis Dot Structure

An illustration depicting the connections between a molecule's atoms and displaying the presence of electrons that are not bonded, if any.

Calcium

A metallic chemical element essential for living organisms, particularly in cell physiology and bone formation.