Expanding Universe Quick Check

Question

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Question
Which sentence about galaxies provides evidence of universe expansion that supports the Big Bang Theory?(1 point)
Responses

Galaxies are in constant motion.
Galaxies are in constant motion.

Galaxies are moving more slowly than they have in the past.
Galaxies are moving more slowly than they have in the past.

Galaxies are moving away from each other.
Galaxies are moving away from each other.

Galaxies are moving at different speeds and in different directions.
Galaxies are moving at different speeds and in different directions.
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Answer 1

The sentence that provides evidence of universe expansion that supports the Big Bang Theory is:

Galaxies are moving away from each other.

This observation is a key piece of evidence for the theory, as it suggests that the universe is expanding.