Big Bang Theory Review

Front

What is the Big Bang Theory?

Back

The Big Bang Theory is the prevailing model about the universe’s origin and is supported by observations of the universe’s expansion.

Front

What evidence supports the Big Bang Theory?

Back

The universe is expanding.

Front

What does it mean that the universe is expanding?

Back

The amount of space between galaxies is increasing.

Front

What are the primary elements found in the universe?

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Most matter in the universe is hydrogen and helium.

Front

What are two important pieces of evidence for the Big Bang?

Back

Doppler Effect (the redshifting of the Universe) and cosmic background radiation.

Front

What is cosmic background radiation?

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Cosmic background radiation is the afterglow radiation from the Big Bang, filling the universe.

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What is redshift?

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Redshift is the phenomenon where light from distant galaxies is shifted to longer wavelengths, indicating they are moving away from us.

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Who is Edwin Hubble?

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Edwin Hubble was an astronomer who provided evidence for the expansion of the universe through his observations of distant galaxies.

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What is the significance of Hubble's Law?

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Hubble's Law states that the farther away a galaxy is, the faster it is moving away from us, supporting the Big Bang Theory.

Front

What is dark matter?

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Dark matter is a form of matter that does not emit light or energy, making it invisible and detectable only through its gravitational effects.