Spiral Galaxy Rotation Curves Are Generally Fairly Flat Out to Large

question 29

Multiple Choice

Spiral galaxy rotation curves are generally fairly flat out to large distances.Suppose that spiral galaxies did not contain dark matter.How would their rotation curves be different?

• A)The orbital speeds would fall off sharply with increasing distance from the galactic center.
• B)The orbital speeds would rise upward with increasing distance from the galactic center,rather than remaining approximately constant.
• C)The rotation curve would be a straight,upward sloping diagonal line,like the rotation curve of a merry-go-round.
• D)The rotation curve would look the same with or without the presence of dark matter.

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Definitions:

Referential Style

A communication style predominant in early language development where children primarily use language to label objects.

Communicating Style

The characteristic manner in which an individual expresses themselves or exchanges information with others.

Fast Mapping

is the cognitive process by which children are able to learn new words or concepts with minimal exposure, demonstrating the rapid acquisition of language in early development.

Pragmatic Speech

The aspect of spoken language that involves understanding and using language socially and appropriately in different contexts.