Which of the Following Would NOT Be Considered Evidence for Dark

question 89

Multiple Choice

Which of the following would NOT be considered evidence for dark matter in clusters of galaxies?

• A) The velocities and radii of galaxy orbits around the center of mass in the cluster.
• B) The total amount of stars
• C) The temperature of the intergalactic gas
• D) The curvature of gravitationally-lensed galaxies

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Definitions:

Conditioned Response

A learned response to a previously neutral stimulus.

Classical Conditioning

A fundamental learning technique that involves associations between an environmental stimulus and a naturally occurring stimulus.

Unconditioned Response

A natural, unlearned reaction to an unconditioned stimulus.

Conditioned Stimulus

A formerly neutral stimulus that, after association with an unconditioned stimulus, comes to produce a conditioned response.