Big Bang Theory

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What is the Big Bang Theory?

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

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NGSS.HS-ESS1-2

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What is redshift?

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Redshift is the phenomenon where light from an object moving away from an observer is stretched to longer wavelengths, making it appear redder.

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NGSS.HS-ESS1-2

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What is the composition of the universe?

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The Universe is comprised of approximately 74% Hydrogen.

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NGSS.HS-ESS1-2

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Is there a center of the universe?

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There is no center of the universe; it is expanding uniformly in all directions.

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What happens to light from objects moving away from us?

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It spreads the wavelengths of light out, a phenomenon known as redshift.

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NGSS.HS-ESS1-2

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What is the Doppler effect?

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The Doppler effect is the change in frequency or wavelength of a wave in relation to an observer moving relative to the wave source.

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NGSS.HS-PS4-1

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What is blueshift?

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Blueshift is the phenomenon where light from an object moving towards an observer is compressed to shorter wavelengths, making it appear bluer.

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NGSS.HS-ESS1-2

NGSS.HS-PS4-1

NGSS.HS-PS4-3

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What evidence supports the Big Bang Theory?

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Evidence includes the observed expansion of the universe and the cosmic microwave background radiation.

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NGSS.HS-ESS1-2

Front

What is cosmic microwave background radiation?

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It is the afterglow radiation from the Big Bang, filling the universe and providing evidence of its hot, dense origins.

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NGSS.HS-ESS1-2

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What is the significance of the universe's expansion?

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The expansion of the universe supports the Big Bang Theory and indicates that galaxies are moving away from each other.

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NGSS.HS-ESS1-2