Big Bang Review

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What is redshift?

Back

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.

Tags

NGSS.HS-ESS1-2

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What does a greater redshift indicate about a galaxy?

Back

A greater redshift indicates that the galaxy is moving away from us at a faster speed.

Tags

NGSS.HS-ESS1-2

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What is the Cosmic Microwave Background (CMB)?

Back

The CMB is the afterglow radiation from the Big Bang, filling the universe and providing evidence for the Big Bang theory.

Tags

NGSS.HS-ESS1-2

Front

What does it mean if a galaxy is redshifted?

Back

If a galaxy is redshifted, it means that it is moving away from us.

Tags

NGSS.HS-ESS1-2

Front

What are two key pieces of evidence for the Big Bang theory?

Back

Redshift and the Cosmic Microwave Background (CMB) are two key pieces of evidence for the Big Bang theory.

Tags

NGSS.HS-ESS1-2

Front

What is the Doppler effect?

Back

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

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-5

Front

How does the Doppler effect relate to redshift?

Back

The Doppler effect explains redshift as the result of light waves being stretched when an object moves away from the observer.

Tags

NGSS.HS-ESS1-2

Front

What is the significance of the CMB in cosmology?

Back

The CMB provides crucial evidence for the Big Bang theory and helps scientists understand the early universe.

Tags

NGSS.HS-ESS1-2

Front

What does it mean for light waves to be 'stretched'?

Back

Stretched light waves result in longer wavelengths, which can shift visible light towards the red end of the spectrum.

Tags

NGSS.HS-PS4-1

Front

What is the relationship between distance and redshift?

Back

Generally, the greater the distance of a galaxy, the greater its redshift, indicating it is moving away from us.

Tags

NGSS.HS-ESS1-2