Composition of Stars/Big Bang Review

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What is the Big Bang Theory?

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The Big Bang Theory is the leading explanation for the origin of the universe, proposing that it began as a singularity approximately 13.8 billion years ago and has been expanding ever since.

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NGSS.HS-ESS1-2

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What evidence supports the Big Bang Theory?

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Key evidence includes the abundance of hydrogen and helium in the universe, the Cosmic Microwave Background Radiation (CMBR), and the observation that galaxies are moving away from us.

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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, resulting in a longer wavelength and a shift towards the red end of the spectrum.

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NGSS.HS-ESS1-2

NGSS.HS-PS4-1

NGSS.HS-PS4-3

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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, resulting in a shorter wavelength and a shift towards the blue end of the spectrum.

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NGSS.HS-PS4-1

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What does the Cosmic Microwave Background Radiation (CMBR) represent?

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The CMBR 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 Hubble Telescope?

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The Hubble Telescope, launched in 1990, has provided crucial data about the universe, including the rate of its expansion and the discovery of exoplanets.

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What does it mean when a star is moving away from Earth?

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When a star is moving away from Earth, it exhibits redshift, indicating that the universe is expanding.

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NGSS.HS-ESS1-2

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What is the relationship between the wavelength of light and its color?

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The wavelength of light determines its color; shorter wavelengths correspond to blue light, while longer wavelengths correspond to red light.

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NGSS.HS-PS4-1

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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

NGSS.HS-PS4-3

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What is the role of hydrogen and helium in the universe?

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Hydrogen and helium are the two most abundant elements in the universe, formed shortly after the Big Bang, and are the building blocks for stars.

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NGSS.HS-ESS1-3