Term
| the aesthenosphere is composed of rock rich in |
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Definition
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Term
| As a granitic magma (wet melt) rises toward the surface |
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Definition
| its melting temp will increase, and it will tend to crystallize before it reaches the surface |
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Term
| A partial melt of the atenosphere will tend to rise toward the surface because |
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Definition
| the melt is less dense than the surrounding rock |
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Term
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Definition
| when the basalt flow is erupted into water |
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Term
| when two ocean plates converge |
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Definition
| the older plate will be subducted |
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Term
| When two ocean plates converge |
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Definition
| the older plate will be subducted |
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Term
| the most widely accepted explanation for the earths magnetic field |
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Definition
| a movement of electrons in the molten iron of its outer core |
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Term
| What kind of plate margin existed when the Appalachian Mountains formed during the Paleozeoic Era |
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Definition
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Term
| Diamond is harder than graphite because |
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Definition
| diamonds have covalent bonds between its constituent atoms while graphite has vanderwahl bonds |
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Term
| The Silicate tetrahedron (SiO4) has a net charge of |
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Definition
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Term
| Why do terrestrial planets have so little molecular (gaseous) hydrogen |
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Definition
| the terrestrial planents are close to the sun and the low density hydrogen was lost to space |
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Term
| Why does the topographic expression of the Hawaiian Island become progressively lower from the big island |
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Definition
| the ocean lithosphere is lighter over the hotspot and it floats higher |
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Term
| Arrange the compositional zones of the earth according to their respective denstiry (densest to lightest) |
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Definition
| inner core, outer core, mantle, ocean crust, continental crust |
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Term
| What kind of plate margin is represented by the Andes Mountains |
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Definition
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Term
| Meteorites are thought to be composed of |
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Definition
| materials hat are similar in composition to those found in the solid earth |
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Term
| Which zone of the earth is also described as the "low velocity zone" |
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Definition
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Term
| The melting temp of _____ must be reached in order for the earth to become compositionally zone |
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Definition
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Term
| Transform plate boundaries are typically associated with |
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Definition
| divergent margins where the rate of spreading is different along segments of the spreading ridge |
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Term
| What is the significane of the change in direction of the Hawaiian Island chain and the Emperor Seamount chain |
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Definition
| the tectonic plate on which both island on which both island chains sit changed directions |
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Term
| Which tectonic margin would tend to have deep and shallow focused earthquakes |
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Definition
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Term
| S-waves____ as they travel through the outer core |
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Definition
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Term
| WHy is there a low velocity zone for seismic waves entering the asthenosphere |
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Definition
| the athenosphere is a partial melt and seismic wave decelerate as they enter the phase change |
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