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The Terrestrial Planets Terms

The Terrestrial Planets Terms - ago 6 Outflow Channels...

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The Terrestrial Planets- Terms 1. Intercrater Plains - Regions on the surface of Mercury that do not show extensive cratering but are relatively smooth. 2. Scarp - Surface feature on Mercury believed to be the result of cooling and shrinking of the crust forming a wrinkle on the face of the planet. 3. Shield Volcanoes - A volcano produced by repeated non explosive eruptions of lava, creating a gradually sloping shield shaped low dome. Often contains a caldera at its summit. 4. Corona - One of numerous large, roughly circular regions on the surface of Venus, thought to have been caused by upwelling mantle material causing the planet’s crust to bulge outward (plural, Coronae) 5. Runoff Channels - River like surface feature on Mars, evidence that liquid water once existed there in great quantities. They are found in the southern highlands and are thought to have been formed by water that flowed nearly 4 billion years
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Unformatted text preview: ago. 6. Outflow Channels- Surface feature on Mars, evidence that liquid water once existed there in great quantities; believed to be the relics of catastrophic flooding about 3 billion years ago. Found only in the equatorial regions of the planet. 7. Permafrost- Layer of permanently frozen water ice believed to lie just under the surface of Mars. 8. Primary Atmosphere- The chemical components that would have formed Earth’s atmosphere. 9. Secondary Atmosphere- the chemicals that composed Earth’s atmosphere after the planet’s formation, once volcanic activity out gassed chemicals from the interior. 10. Runaway Greenhouse Effect- A process in which the heating of a planet leads to an increase in its atmosphere’s ability to retain heat and thus to further heating, causing extreme changes in the temperature of the surface and the composition of the atmosphere....
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