8.8D Origins of the Universe

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What is the Big Bang Theory?

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The Big Bang Theory is a scientific explanation for the origin of the universe, suggesting that it formed from a huge explosion that sent all existing matter flying outward from a single point.

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NGSS.HS-ESS1-2

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What characteristic does the universe change in according to the Big Bang Theory?

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The universe changes from more dense to less dense over time.

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NGSS.HS-ESS1-2

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What evidence supports the Big Bang Theory regarding the movement of stars?

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The observation that all stars we see from Earth are moving away from us, indicated by the redshift of their light.

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NGSS.HS-ESS1-2

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What does the redshift of light from distant galaxies indicate?

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It indicates that galaxies are moving away from each other, supporting the expansion of the universe.

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NGSS.HS-ESS1-2

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What were the original two elements in the universe according to the Big Bang Theory?

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Helium and Hydrogen.

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NGSS.HS-ESS1-2

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Why do we see light from celestial objects as being from the past?

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Because light takes time to travel from those objects to Earth, meaning we observe them as they were when the light was emitted.

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What is the significance of galaxies moving away from each other?

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It supports the idea that the universe is expanding, a key concept in the Big Bang Theory.

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NGSS.HS-ESS1-2

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What is cosmic microwave background radiation?

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It is the afterglow radiation from the Big Bang, providing evidence for the theory.

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NGSS.HS-ESS1-2

Front

How does the Big Bang Theory explain the abundance of light elements in the universe?

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It predicts that during the first few minutes after the Big Bang, conditions were right for the formation of light elements like Hydrogen and Helium.

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NGSS.HS-ESS1-2

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What is the role of dark energy in the context of the universe's expansion?

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Dark energy is thought to be responsible for the accelerated expansion of the universe.