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Ch 9 Venus
Vocabulary
| Term | Definition |
|---|---|
| Apparent Brightness | how bright an object appears to be when observed from Earth |
| Angular Diameter | angle made between two opposite edges of an object as seen by an observer (a.k.a. angular size) |
| Inferior Conjunction | when an inferior planet (Mercury or Venus) is at its closest to Earth |
| Superior Conjunction | when an inferior planet (Mercury or Venus) is at its farthest from Earth |
| Maximum Elongation | largest angular distance between a planet and the Sun as seen from Earth |
| Retrograde Rotation | clockwise, or backwards, spin of an object |
| Solar Day | time between when the Sun is at its highest in the sky (solar noon) from one day to the next |
| Sidereal Day | time it takes to spin once with respect to background stars on the celestial sphere |
| Synodic Period | time between one closest approach to Earth and the next |
| Plate Tectonics | movement of continents around the surface (a.k.a. continental drift) |
| Ocean Basin | large geologic basin that is below sea level, or the average elevation of a planet or moon |
| Ishtar Terra | one of two main highland/continent-like regions, near Venus' North Pole |
| Aphrodite Terra | one of two main highland/continent-like regions, near Venus' equator |
| Revolve | to orbit |
| Rotate | to spin |
| Volcanism | eruption of molten rock onto the surface of a solid-surface planet or moon |
| Shield Volcano | produced by repeated nonexplosive eruptions of lava, creating a gradual slope |
| Lava Dome | formed when lava oozes out of fissures in a planet's surface, and then withdraws |
| Lava Flow | streams of molten rock that pour or ooze from an erupting vent |
| Corona | large, roughly circular region on the surface of Venus where the planet's crust bulges outward |
| Sulfuric Acid | strong corrosive acid; makes up the majority of Venus' clouds |
| Polar Vortex | long-lived pattern of circulating winds around the pole of a planet |
| Runaway Greenhouse Effect | when heating of a planet leads to an increase in its atmosphere's ability to retain heat and to further heating |
| Asthenosphere | layer of Earth's interior just below the lithosphere over which the surface plates slide |
| Hot Spot | area under the crust where magma is hotter than the surrounding magma, forming volcanoes |
| Seismology | study of quakes and the waves they produce in a body's interior |
| Topography | forms and features of land surfaces |
Created by:
john_bailey720
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