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| This planet has a cool, solid surface, a thin carbon dioxide atmosphere, and occassional dust clouds. Which planet fits this description? |
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| This planet has a solid, cratered surface, which is alternately very hot and very cold, andhas not atmosphere. Which of the planets fits this description? |
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| Which planet most resembles the Moon in visible surface features and atmosphere? |
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| The internal stucture of Mercury is a |
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| dense iron core taking up almost half of the volume of the planet and a rocky mantle surrounding the core. |
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| The Caloris Basin, a huge circular regio on Mercury surrounded by rings of mountains, appears to have been produced by |
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| the impact of a massive objest in the early phases of the planet's formation, soon after the initial cratering period. |
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| The geology and geography of the surface of Venus is best described as |
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| mostly volcanic plains, with two continent-sized uplands and a number of large volcanoes |
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| Mercury is unique amoung the inner planets in having |
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| an iron core that occupies almost half its volume |
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| This planet has a very hot solid surface, it is cloud-shroded, and it has a dense carbon dioxide atmosphere. Which of the planets fits that description? |
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| in the opposite direction from the Earth but very slowly |
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| An Earth-based telescopic view of Venus shows |
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| a completely cloud-shrouded planet with high atmospheric wind speeds |
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| The surface temperature of Venus has been found by radio observatios and by remoteexploration by spacecraft to be approximately |
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| The surface pressure of the atmosphere of Venus compare with the surface pressure of the atmosphere of Earth is |
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| Whicch of the following physical properties of Venus are very similar in value to those of the Earth? |
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| mass and radius and hence average density and surface gravity. |
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| Why did the first Soviet spacecraft to land on Venus survive for only a few minutes? |
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| The conditions of extreme pressure, corrosive atmosphere, and high temperatures severely damaged it |
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| The conditions on the surface of Venus are |
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| a high-pressure, high-temperature, carbon dioxide atmosphere |
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| The "greenhouse effect" which causes very high temperatures on the surface of Venus and moderate temperature on Earth, is caused because |
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| Greenhouse gas molecules absorb infrared, hearing the gas in the atmosphere. |
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| The most common surface features on Venus are |
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| What is the material that produces the distinct red color of Mars? |
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| What are the Vallws Marnneris? |
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| large rift valley system associated with the great volcanoes on Mars |
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| In whic of the following physical characteristics are the Earth and Mars most similar to each other? |
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| irregularly shaped, cratered, and grooved |
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| What is the major constituent of the atmosphere of Mars? |
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| Which of the following statements is true of Mars? |
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| Mars has dry riverbeds but no liquid water on its surface at the present time |
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