Formation of the Universe Homework

Front

What is redshift?

Back

Redshift is the phenomenon where light from an object moving away from us is shifted toward the red end of the spectrum.

Tags

NGSS.HS-ESS1-2

Front

How do we know a star is moving away from Earth?

Back

We know a star is moving away from Earth if its spectral lines are shifted toward the red end of the spectrum.

Tags

NGSS.HS-ESS1-2

Front

What is visible light?

Back

Visible light is the part of the electromagnetic spectrum that can be seen by the human eye.

Tags

NGSS.HS-PS4-3

Front

What happens to the spectral lines of a star moving away from Earth?

Back

The spectral lines are shifted toward the red end of the spectrum.

Tags

NGSS.HS-ESS1-2

Front

How does the universe expand like rising raisin bread dough?

Back

As the dough expands, the raisins move further apart from each other.

Front

What is the absorption spectrum of a star?

Back

The absorption spectrum of a star shows the specific wavelengths of light that are absorbed by elements in the star's atmosphere.

Tags

NGSS.HS-PS4-3

Front

What is the significance of the absorption spectrum in astronomy?

Back

The absorption spectrum helps astronomers determine the composition, temperature, density, and motion of stars.

Tags

NGSS.HS-ESS1-2

NGSS.HS-PS4-4

Front

What does it mean if a galaxy shows redshift?

Back

If a galaxy shows redshift, it means that the galaxy is moving away from us.

Tags

NGSS.HS-ESS1-2

Front

What is the relationship between distance and redshift?

Back

The greater the distance of a galaxy, the more redshift we observe, indicating it is moving away faster.

Tags

NGSS.HS-ESS1-2

Front

What are electromagnetic waves?

Back

Electromagnetic waves are waves of energy that travel through space, including visible light, radio waves, and X-rays.

Tags

NGSS.HS-PS4-3