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Multiple Choice
A) It held that sometimes the planets moved backward along their circular orbits.
B) It placed the Sun at the center so that the planets' apparent retrograde motion was seen as Earth passed each one in its orbit.
C) It varied the motion of the celestial sphere so that it sometimes moved backward.
D) It held that the planets moved along small circles that moved on larger circles around the Sun.
E) It held that the planets moved along small circles that moved on larger circles,also known as epicycles,around Earth.
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Essay
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True/False
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Multiple Choice
A) Spring
B) Summer
C) Fall
D) Winter
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True/False
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Multiple Choice
A) Science consists of proven theories that are understood to be true explanations of reality.
B) Scientific explanations should be based solely on natural causes.
C) Science progresses through the creation and testing of models that explain observation as simply as possible.
D) A scientific model must make testable predictions.
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