Which of the following is a reason why the Ptolemaic model was the accepted model of the Universe?
A) It was a very good predictor of planet positions.
B) The authority of Aristotle was immense.
C) It proved that the Sun was at the center of the Universe.
D) The multiple revisions to the model made it completely accurate.
B
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Process of Science: How did scientists determine the location of the center of the Milky Way, and why had they been wrong in their previous estimate (where they placed the Sun near the center)?
What will be an ideal response?
Which of the following material phases cannot form a solution?
A) solids B) liquids C) gases D) All of the above can form solutions. E) None of the above can form solutions.
Why does the term "planet" have a different meaning when applied to brown dwarfs than in our solar system?
What will be an ideal response?
What are the three key necessities for all life on Earth?
A) (1) nutrients, (2) energy, (3) liquid water B) (1) liquid water, (2) carbon, (3) oxygen C) (1) nutrients, (2) liquid water, (3) oxygen D) (1) DNA, (2) mutations, (3) liquid water E) (1) DNA, (2) liquid water, (3) oxygen