To Determine How the Expansion Rate of the Universe Has

question 2

Multiple Choice

To determine how the expansion rate of the universe has changed over time,astronomers must measure __________ for a sample of Type I supernovae in distant galaxies.

• A) redshift and luminosity
• B) redshift and brightness
• C) distance and luminosity
• D) distance and brightness

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Definitions:

Unconditioned Stimulus

A stimulus that naturally triggers a response without the need for prior learning.

Conditioned Response

A learned response to a previously neutral stimulus, but after conditioning, elicits a response through association.

Unconditioned Response

An automatic, natural response to a stimulus that occurs without the need for prior learning or conditioning.

Unconditioned Stimulus

In classical conditioning, a stimulus that naturally and automatically triggers a response without prior learning.