Integrated Science
Integrated Science
7th Edition
ISBN: 9780077862602
Author: Tillery, Bill W.
Publisher: Mcgraw-hill,
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Chapter 12.7, Problem 9SC
To determine

The basic unit of the universe.

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The largest structures in the universe are   a. star clusters.   b. galaxy clusters.   c. galaxy superclusters.   d. filaments and voids.   e. galaxies.
If our universe is expanding, what are the implications for the separation between two stars within our galaxy?   A. The two stars are moving farther apart.   B. The two stars are moving closer together.   C. The distance between the two stars is unaffected.    D. The question is impossible to answer without more information.
Measured ages of globular clusters and a study of the time required for massive stars to build up the present abundance of heavy elements suggests that the universe is   a. at least 20 billion years old.   b. no more than 10 billion years old.   c. about 14 billion years old.   d. flat.   e. closed.
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