Origins of the Universe Review

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What is the Big Bang Theory?

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The Big Bang Theory is a scientific explanation that describes the origin of the universe as a huge explosion that occurred approximately 13.8 billion years ago, leading to the expansion of space and the formation of matter.

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NGSS.HS-ESS1-2

Front

What evidence supports the Big Bang Theory?

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Evidence supporting the Big Bang Theory includes the observation that all galaxies appear to be moving away from each other, indicating that the universe is expanding.

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NGSS.HS-ESS1-2

Front

What does redshift in light from distant galaxies indicate?

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Redshift indicates that galaxies are moving away from us, which supports the idea of an expanding universe as proposed by the Big Bang Theory.

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NGSS.HS-ESS1-2

Front

How old is the universe estimated to be?

Back

The universe is estimated to be more than 13 billion years old.

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What is cosmic microwave background radiation?

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Cosmic microwave background radiation is the afterglow of the Big Bang, a faint radiation that fills the universe and provides evidence of its hot, dense origins.

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NGSS.HS-ESS1-2

Front

What is the significance of the observable universe?

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The observable universe refers to the part of the universe that we can see and measure, which is limited by the speed of light and the age of the universe.

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What is the role of dark energy in the universe?

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Dark energy is a mysterious force that is thought to be responsible for the accelerated expansion of the universe.

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What are galaxies?

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Galaxies are massive systems that consist of stars, stellar remnants, interstellar gas, dust, and dark matter, bound together by gravity.

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What is the difference between a star and a galaxy?

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A star is a luminous celestial body made of plasma that generates energy through nuclear fusion, while a galaxy is a large system containing billions of stars, along with gas and dust.

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What is the observable effect of the universe's expansion?

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The observable effect of the universe's expansion is that distant galaxies appear to be moving away from us, which is observed as a redshift in their light.

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NGSS.HS-ESS1-2