Use the excerpt from an online article to answer the question.
“While the big bang theory is the most popular modern theory of how the universe formed, it is incomplete.”
Which question does the big bang theory leave unanswered?
(1 point)
When did the universe form?
What is the future of the universe?
How did galaxies and stars form?
What is the temperature of deep space?
The question that the big bang theory leaves unanswered is: How did galaxies and stars form?
To identify which question the big bang theory leaves unanswered, we can analyze the given excerpt: "While the big bang theory is the most popular modern theory of how the universe formed, it is incomplete."
The excerpt suggests that the big bang theory does not provide a complete explanation for the formation of the universe. It implies that there are remaining unanswered aspects.
Among the options provided, the big bang theory primarily focuses on explaining how the universe formed and doesn't directly address other specific aspects such as the future of the universe or the temperature of deep space.
However, one question that the big bang theory does leave unanswered is "How did galaxies and stars form?" The formation of galaxies and stars is not explicitly explained within the scope of the big bang theory. It focuses more on the initial expansion and development of the universe as a whole.
Therefore, the correct answer is: How did galaxies and stars form?