The Universe & Its Stars

Two pieces of evidence for our current theory of the universe are:

• blueshift, CMB

• redshift, Andromeda galaxy.

• redshift, CMB

• doppler effect, moon landing

Tags

NGSS.HS-ESS1-2

Galaxies that are redshifted are:

• actually blue.
• really far away.
• invisible.
• moving away from us.

Tags

NGSS.HS-ESS1-2

The universe is expanding!  This means that:

• all of the galaxies are spreading out.
• the universe must have started from a single point.
• the universe is cooling down.
• all of the above.

Tags

NGSS.HS-ESS1-2

The CMB is:

• the remaining energy from the big bang.
• incredibly hot.
• visible to the human eye.
• only located in certain places in the universe.

Tags

NGSS.HS-ESS1-2

Our theory of the universe was confirmed by the discovery of:

• fusion.
• cosmic microwave background radiation.
• the Andromeda galaxy.
• the Doppler effect.

Tags

NGSS.HS-ESS1-2

The universe is ____________ years old.

• 8.13 billion
• 13.8 billion
• 1.83 billion
• 381 million

Tags

NGSS.HS-ESS1-2

The greater the redshift:

• the faster the galaxy is moving.
• the shorter the light waves.
• the bigger the galaxy.
• the closer the galaxy.

Tags

NGSS.HS-ESS1-2

What is true about these stars?

• Both of these stars are moving away from us.
• Both of these stars are moving towards us.
• Both of these stars are blueshifted.
• The star Sirius is closer to us.

Tags

NGSS.HS-ESS1-2

NGSS.HS-PS4-3

In red shift, the wavelengths of light become

• Longer

• Shorter

• Bluer

• Slower

Tags

NGSS.HS-ESS1-2

What happens to spectral lines as a star is moving towards an observer?

• They are shifted towards the red light.

• They are shifted towards the blue light.

• They appear more red.

• They appear more blue.

Tags

NGSS.HS-ESS1-2