Rotation Curves for Spiral Galaxies Show

question 89

Multiple Choice

Rotation curves for spiral galaxies show:

• A)they are slowing down.
• B)rotation speed drops off further from the nucleus.
• C)most have dark halos.
• D)most of the mass lies in the nucleus.
• E)no relation to mass.

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Definitions:

Complaining

The expression of dissatisfaction or annoyance about something.

Blinking

A rapid closing and opening of the eyelid, which is an involuntary reflex to protect the eye from irritants and distribute tear fluid.

Respondent Behavior

Actions that occur as an automatic response to some stimulus, typically conditioned through learning processes.

Stimulus

Any event or situation that evokes a response.