The Possible Presence of a Very Large Amount of Unseen

question 20

Multiple Choice

The possible presence of a very large amount of unseen ("dark") matter in the halo of our Galaxy is deduced from the

• A) unexpected absence of luminous matter (stars,etc. )beyond a certain distance.
• B) rotation curve of our Galaxy,which indicates higher than expected orbital speeds in the outer regions of the Galaxy.
• C) rotation curve of our Galaxy,which shows that orbital speeds in the outer parts of the Galaxy decrease in a way that follows Kepler's law.
• D) unexpected high amount of interstellar absorption in certain directions.

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Definitions:

Cohesion

The degree to which members of a group or team are connected and remain united in achieving a common goal.

Attraction

A force that draws individuals together, leading to friendships, romantic relationships, or other forms of social involvement.

Group Rituals

Established sequences of activities or ceremonies that are performed by a group, often with symbolic value.

Team Work

The collaborative effort of a group to achieve a common goal or complete a task in the most effective and efficient way.