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Last updated 1:49 PM on 6/21/26
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3 Terms

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What is the Big Bang Theory?

The Big Bang Theory proposes that the universe originated from an extremely hot and dense state and has been expanding ever since.

2
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What does the Steady State Theory propose?

The Steady State Theory suggests that the universe is eternal and unchanging on a large scale, with new matter being created to maintain a constant density as it expands.

3
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What is the Oscillating Universe Theory?

The Oscillating Universe Theory posits that the universe undergoes a series of expansions and contractions in a cyclic manner.