character: Galileo Galilei
topic: Early concepts of motion and gravity
grade: 6
subject: History
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character: Aristotle
topic: Ancient beliefs about motion
grade: 6
subject: History
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character: Isaac Newton
topic: Laws of motion and universal gravitation
grade: 6
subject: History
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character: Copernicus
topic: Heliocentric theory and its influence on motion
grade: 6
subject: History
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