The parallel grooves seen on the surface of Phobos may indicate that a.the moon formed elsewhere in the solar system and was captured by Mars. b.the moon formed simultaneously with Mars. c.Phobos was ejected from the surface of Mars after a massive impact by a large asteroid. d.the impact that caused the large crater on Phobos also produced cracks and fractures in the surface. e.Phobos split in half early in its history with one half hitting Mars soon thereafter.

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The parallel grooves seen on the surface of Phobos may indicate that a. the moon formed elsewhere

Horizons: Exploring the Universe (MindTap Course List)

14th Edition

ISBN:9781305960961

Author:Michael A. Seeds, Dana Backman

Publisher:Michael A. Seeds, Dana Backman

Chapter17: Mercury, Venus, And Mars

Section: Chapter Questions

Problem 8RQ: Why do astronomers conclude that the crust on Mars must be thicker than Eths crust?

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The parallel grooves seen on the surface of Phobos may indicate that

	a.	the moon formed elsewhere in the solar system and was captured by Mars.
	b.	the moon formed simultaneously with Mars.
	c.	Phobos was ejected from the surface of Mars after a massive impact by a large asteroid.
	d.	the impact that caused the large crater on Phobos also produced cracks and fractures in the surface.
	e.	Phobos split in half early in its history with one half hitting Mars soon thereafter.

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