Doppler Effect and the Expanding Universe

What best describes the doppler effect?

• An apparent change in frequency of a wave due to the relative motion between a wave source and an observer
• When sound changes pitch
• When light changes color
• An apparent change in the amplitude of a wave due to the relative motion between a wave source and an observer.

Tags

NGSS.HS-PS4-1

The vast majority of galaxies in our universe are moving away from us.  We know this because we observe __________ in the galaxies absorption spectra.

• Redshift
• Blueshift
• Turbulance
• Superposition

Tags

NGSS.HS-ESS1-2

Which discovery(ies) came from our understanding redshift/ blueshift?

• The universe is expanding
• Most galaxies are moving away from us
• Andromeda galaxy will collide with the Milky way in 3.75 billion years
• All of the above (and many more)

Tags

NGSS.HS-ESS1-2

When blueshift occurs, the perceived frequency of the wave would...

• Increase
• Decrease
• Stay the same
• Make duck sounds

Tags

NGSS.HS-PS4-1

Long sound waves are...

• high pitched
• low pitched
• medium pitched

Tags

NGSS.HS-PS4-1

What can you tell about this object's motion?

• Moving to the North (up).
• Moving to the South (down). 
• Moving to the West (left). 
• Moving to the East (right). 

Cosmic Microwave Background Radiation is a form of _________.

• Matter

• Energy

• Visible Light

• Water

Tags

NGSS.HS-ESS1-2

NGSS.HS-PS4-3

How does Cosmic Microwave Background (CMB) Radiation support the Big Bang Theory?

• CMB radiation is found everywhere in the universe.

• CMB radiation occurred at the time of the Big Bang

• CMB radiation are useful in our everyday lives

• CMB radiation is found on only on the outer parts of the universe.

The "afterglow" of the energy from the origin of the universe that we see today.

• Cosmic microwave radiation

• sunlight

• Doppler effect

• Cosmic explosions

Tags

NGSS.HS-ESS1-2

What happens to the wavelengths of energy if they are moving AWAY from a source?

• The waves stretch out and get longer.

• The waves compress and get shorter.

Tags

NGSS.HS-PS4-1