How Do We Know the Expansion of the Universe Is

question 43

Multiple Choice

How do we know the expansion of the universe is accelerating?

• A)We're really not that sure the expansion is accelerating; it's all just a theory.
• B)White dwarf supernova in distant galaxies are fainter than they would be if the expansion were not accelerating.
• C)We see more of the universe every night, as the observable universe grows in size.
• D)The rotation curves of galaxies indicate the universe is speeding up.
• E)Redshifts of distant galaxies are increasing with time, so when we repeat the measurements, the redshifts are larger.

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Definitions:

Broca's Area

An area located in the dominant hemisphere's frontal lobe (typically the left side) of the brain, associated with the generation of speech.

Penfield

Refers to Wilder Penfield, a neurosurgeon who made significant contributions to the understanding of the brain's function, particularly in mapping the sensory and motor cortices.

Language-Expression Deficits

Difficulties in the ability to convey thoughts, ideas, or feelings through spoken, written, or nonverbal language.

Wernicke's Aphasia

A form of aphasia characterized by fluent but meaningless speech and difficulty in understanding spoken words, often caused by damage to the posterior section of the temporal lobe.