By Peggy Parks

ISBN-10: 1590186362

ISBN-13: 9781590186367

Grade 5-7-This drab yet systematic survey deals scholars an summary of our examine of the purple Planet, from old observations of its likely abnormal course during the sky to NASA's April 2004 selection to increase the missions of rovers Spirit and chance. regardless of infrequent and clumsy efforts to rev it up ("After screaming via area at 16 thousand miles according to hour:"), the prose is as dry because the Martian floor, and a number of other of the accompanying, faded-looking black-and-white photographs or diagrams upload neither details nor perception. nonetheless, made up our minds readers will locate lots of present info, plus a strongly made case for sending people to Mars, and, to shut, relatively thorough and resource lists. whereas Seymour Simon's vacation spot: Mars (HarperCollins, 2000) or Stuart Murray and Edward S. Barnard's Mars (DK, 2004) have a long way improved browser allure, Parks's publication is an acceptable selection for deeper topic collections.

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Exploring Mars - download pdf or read online

Grade 5-7-This drab yet systematic survey deals scholars an summary of our research of the purple Planet, from historical observations of its doubtless abnormal course in the course of the sky to NASA's April 2004 selection to increase the missions of rovers Spirit and chance. regardless of infrequent and clumsy efforts to rev it up ("After screaming via area at 16 thousand miles in step with hour:"), the prose is as dry because the Martian floor, and several other of the accompanying, faded-looking black-and-white photographs or diagrams upload neither info nor perception.

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Author and astronomer Carl Sagan (shown here with a Viking model) was part of the team that sent Viking 1 to Mars in July 1976. 60 Exploring Mars The Viking mission had several important goals, one of which was to obtain images of the Martian surface that could answer some questions raised by the Mariner photos. The spacecraft would also analyze the atmosphere and make inferences about the planet’s interior. But Viking’s most important objective, as stated in a NASA mission report, was to search for evidence of living things: “The question of life on Mars has been [speculated on] for a hundred years.

Despite the size differences between the two planets, the surface area of Mars is roughly the same size as the land area of Earth. That is because approximately 70 percent of Earth is covered by oceans, and these vast bodies of water do not exist on Mars. A Rugged, Rocky Planet Although the terrain on Mars is more like Earth’s than any other planet’s, it is extremely rugged and desertlike. Much of the Martian surface is covered with thick, powdery soil that has the consistency of flour, and the ground is strewn with jagged rocks and boulders of all shapes and sizes.

Hartmann explains the significance of this: “Some individual flow units could be as young as 10 million years or less. ”11 The northern hemisphere of Mars is home to the Tharsis Bulge, an expansive volcanic region that rises six miles above the Martian surface and covers an area as large as North America. There are many volcanoes in the Tharsis area, including some so massive that they dwarf any volcanoes found on Earth. Scientists An Earth-Like World cannot say for sure why Martian volcanoes grow to be so large, but they believe it is because Mars’s surface does not consist of separate crustal plates as Earth’s does.

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Exploring Mars by Peggy Parks


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