Human beings are composed almost entirely of elements that were created in the Big Bang.
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Q11: A light-year is a unit commonly used
Q12: A crucial component of a scientific theory
Q13: There are nearly 1,000 times more galaxies
Q14: The word astronomy means:
A) "patterns among the
Q15: Which of the following is FALSE?
A) The
Q17: Once a scientific theory is declared to
Q18: If a scientific theory cannot be tested,
Q19: The invention of satellites advanced astronomy because
Q20: A great majority of the matter in
Q21: The average distance between the Earth and
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