1. Name: ________________________ Period: ____ Date:__________________
Astronomy Homework The Big Bang & Doppler Effect
1) The explosion associated with the theory and the formation of the universe
inferred to have occurred how many billion ago?
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2) The more that the spectral lines of a star are shifted to the red end of the
spectrum
A) the larger it is. B) the faster it is rotating
C) the hotter it is D) the faster it is moving away from us
3) The diagram below illustrates three stages of a current theory of the
formation of the universe.
A major piece of scientific evidence supporting this theory is the fact that
wavelengths of light from galaxies moving away from Earth in stage 3 are
observed to be
A) shorter than normal (a red shift)
B) shorter than normal (a blue shift)
C) longer than normal (a red shift)
D) longer than normal (a blue shift)
A major piece of scientific evidence supporting this theory is the fact that
wavelengths of light from galaxies moving away from Earth in stage 3 are observed
to be… circle one: Longer or Shorter
4) When viewed from Earth, the light from very distant galaxies shows a red shift.
Explain what this is evidence for.
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2. 5) According to Hubbell’s law more rapidly moving galaxies are now
A) further away from us B) closer to us
C) accelerating rapidly D) already contracting toward another big bang
Base your answer on the calendar model shown below of the inferred history of the
universe and on your knowledge of Earth science. The 12-month time line begins
with the Big Bang on January 1 and continues to the present time, which is
represented by midnight on December 31. Several inferred events and the relative
times of their occurrence have been placed in the appropriate locations on the time
line.
6) State two pieces of evidence used by scientists to support the theory that the
Big Bang event occurred.
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7) Read the article titled Murmur of a Bang. Answer the following questions:
a) What type of radiation was discovered coming from all regions of space?
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b) What is the importance of this discovery? What does it provide evidence for?
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