Solar System REview

Which pair of shaded circles best represents the relative sizes of Earth and Venus when drawn to scale?

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Which bar graph best represents the equatorial diameters of the eight planets of our solar system?

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This diagram of our solar system represents a

• geocentric model with Earth near the center

• heliocentric model with Earth near the center

• heliocentric model with the Sun near the center

• geocentric model with the Sun near the center

The formation of the planet Uranus is estimate to have

occurred approximately

• 2.0 billion years ago

• 4.6 billion years ago

• 13.7 billion years ago

• 100,000 million years ago

Compared to Jovian planets, Terrestrial planets have

• larger equatorial diameters and longer

  periods of revolution

• smaller equatorial diameters and shorter periods

  of revolution

• smaller equatorial diameters and longer periods

  of revolution

• larger equatorial diameters and shorter periods of

  revolution

Base your answer to the following question on the diagram below, which shows an inferred sequence in which our solar system formed from a giant interstellar cloud of gas and debris. Stage A shows the collapse of the gas cloud, stage B shows its flattening, and stage C shows the sequence that led to the formation of planets. After the young Sun formed, the disk of gas and dust

• eventually formed into planets

• became spherical in shape

• became larger in diameter

• formed a central bulge