Which One of These Statements About Clusters of Galaxies Is

question 28

Multiple Choice

Which one of these statements about clusters of galaxies is true?

• A) The observed mass of the galaxies of the cluster is many thousands of times too small to hold the cluster together.
• B) The observed mass of the galaxies of the cluster is about 10 times larger than the amount needed to hold the cluster together.
• C) The observed mass of the galaxies in the cluster is about 10 times too small to hold the cluster together.
• D) The observed mass of the galaxies of the cluster is almost exactly equal to the mass needed to hold the cluster together.

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Definitions:

Frontal Lobe

is the area of the brain responsible for voluntary movement, expressive language, and for managing higher level executive functions.

Temporal Lobe

A region of the cerebral cortex involved in auditory perception, memory, and speech.

Occipital Lobe

The region of the cerebral cortex located at the back of the brain, responsible for processing visual information.

Withdrawal Response

A defensive reaction to a threat or pain, characterized by pulling away or retreating.