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8.8 DE Origin or the Universe and Light Years

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Answer
Light Year   a unit of length equal to the distance light travels through space n one year.  
ScientificTheories   unifying scientific explanations for a broad range of hypotheses and observations that have been supported by scientific evidence  
Origin   the place or form from which something comes or is derived  
Universe   all space and the matter space contains  
Big Bang Theory   a theory that days that the universe began as a small point that expanded rapidly about 13.7 billion years ago  
Red Shift   occurs when a light source moves away from an observer  
Blue Shift   occurs when a light source moves toward an observer  
Oscillating Theory   the theory that states the universe will continue to expand and contract in a cycle, forever  
Big Crunch Theory   the theory that states the expansion of space will eventually reverse and will recollapse, ultimately causing the cosmic scale factor to reach zero or cause a reformation of the universe with another "bang"  
Evidence that Supports the Big Bang Theory   red shift and the Cosmic Microwave Background radiation  


   






 
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Created by: kendra.young