The Understanding of the Solar System

This contributes to orbital motion.

• gravity

• fireballs

• sun's radiation

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Emily is preparing a model of the solar system for her science class. She assembles four objects to represent Mercury, Jupiter, Earth, and the Sun. Which of the following objects would best represent Earth in her solar system model?

• grain of sand

• small pebble

• marble

• basketball

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Who is recognized for contributing to the development of more accurate, Sun-centered (heliocentric) models of the solar system?

• Nicholas Copernicus

• Galileo Galilei

• Both A and B

• Early astronomers with geocentric models

What marked the beginning of a major shift away from the geocentric model among astronomers?

• Galileo's observations of the Moon

• The acceptance of the geocentric model

• Copernicus' proposal of a Sun-centered model

• The flawless nature of the heliocentric model

Who were the two early astronomers mentioned in the text that developed geocentric models of the solar system?

• Galileo and Kepler

• Copernicus and Newton

• Aristotle and Ptolemy

• Hubble and Einstein

What is the main characteristic of the geocentric models developed by Aristotle and Ptolemy?

• They placed the Sun at the center of the solar system.

• They suggested that the Earth orbits the Sun.

• They placed the Earth at the center of the solar system.

• They were based on the concept of elliptical orbits.

What was one of the problems with geocentric models according to the text?

• They accurately explained the movement of planets.

• They could not easily explain how planets move relative to the stars.

• They were well-received by all astronomers.

• They explained the "wandering" movement of planets as a common occurrence.

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Which statement best describes the initial reception of Copernicus' model during his lifetime?

• It was immediately accepted by the majority of astronomers.

• It was not well-received.

• It was considered flawless and complete.

• It did not contribute to the understanding of the solar system.

What was a flaw in Copernicus' heliocentric model as mentioned in the text?

• It did not include the Moon.

• It had the planets orbiting the Sun along elliptical paths.

• It had the planets orbiting the Sun along circular paths.

• It was too similar to the geocentric model.

What have the most widely accepted models of the solar system today built upon?

• Theoretical physics principles

• Previous astronomers' original models

• Science fiction literature

• Modern computer technology

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