WorksheetsDoppler Effect and the Expanding Universe
Total questions: 10
Worksheet time: 20mins
Name
Class
Date
1.
What best describes the doppler effect?
a)
An apparent change in frequency of a wave due to the relative motion between a wave source and an observer
b)
When sound changes pitch
c)
When light changes color
d)
An apparent change in the amplitude of a wave due to the relative motion between a wave source and an observer.
2.
The vast majority of galaxies in our universe are moving away from us. We know this because we observe __________ in the galaxies absorption spectra.
a)
Redshift
b)
Blueshift
c)
Turbulance
d)
Superposition
3.
Which discovery(ies) came from our understanding redshift/ blueshift?
a)
The universe is expanding
b)
Most galaxies are moving away from us
c)
Andromeda galaxy will collide with the Milky way in 3.75 billion years
d)
All of the above (and many more)
4.
When blueshift occurs, the perceived frequency of the wave would...
a)
Increase
b)
Decrease
c)
Stay the same
d)
Make duck sounds
5.
Long sound waves are...
a)
high pitched
b)
low pitched
c)
medium pitched
6.
What can you tell about this object's motion?
a)
Moving to the North (up).
b)
Moving to the South (down).
c)
Moving to the West (left).
d)
Moving to the East (right).
7.
Cosmic Microwave Background Radiation is a form of _________.
a)
Matter
b)
Energy
c)
Visible Light
d)
Water
8.
How does Cosmic Microwave Background (CMB) Radiation support the Big Bang Theory?
a)
CMB radiation is found everywhere in the universe.
b)
CMB radiation occurred at the time of the Big Bang
c)
CMB radiation are useful in our everyday lives
d)
CMB radiation is found on only on the outer parts of the universe.
9.
The "afterglow" of the energy from the origin of the universe that we see today.
a)
Cosmic microwave radiation
b)
sunlight
c)
Doppler effect
d)
Cosmic explosions
10.
What happens to the wavelengths of energy if they are moving AWAY from a source?
a)
The waves stretch out and get longer.
b)
The waves compress and get shorter.
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