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Definition
| when earthquakes occur, they create these in the ocean |
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Definition
| results from a force pressing on an area |
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Definition
| layer of solid rock that includes both dry land and the ocean floor |
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Definition
| dark rock with a fine texture |
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Definition
| rock usually light in color and course texture |
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Definition
| uppermost part of the mantle and the crust of the earst for this rigid layer |
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Term
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Definition
| soft weak layer below the lithosphere, less rigid than rock and hotter. |
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Definition
| beneath the asthenosphere, this solid material extends all the way to the earth's core |
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Term
| What is the core made out of |
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Definition
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Definition
| liquid outer and solid inner |
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Definition
| layer of molten metal that surrounds teh inner core. Liquid. |
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Term
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Definition
| dense ball of solid metal. not liquid. |
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Term
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Definition
| radiation, conduction and convection |
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Term
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Definition
| transfer of energy through space |
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Term
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Definition
| heat transfer within a material or between materials that are touching |
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Term
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Definition
| heat transfer by the movement of currents within a fluid |
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Definition
| measure of how much mass there is in a volume of a substance |
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Definition
| flow that transfers heat within a fluid |
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Term
| what sets convention currents in motion |
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Definition
| heating and cooling of fluid, changes in the fluid's density and force of gravity |
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Term
| what causes convection currents |
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Definition
| heat from the core and mantle |
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Term
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Definition
| "all lands" 300 million yrs ago when all continents were together |
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Term
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Definition
| trace of an ancient organism that has been preserved in rock |
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Term
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Definition
| east pacific rise, winds beneath earth's oceans |
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Definition
| device that bounces sound waves off underwater objects and records echos for distance |
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Definition
| sea spreads apart on both sides of a mid ocean ridge as new crust is added. |
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Definition
| Had a theory of sea floor spreading |
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Term
| evidence of sea floor spreading |
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Definition
| eruptions of molten material, magnetic stripes in rock of ocean floor and ages of rocks. |
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Term
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Definition
| the oceanic crust bends downwards when the ocean floor plunges into deep underwater canyons |
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Term
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Definition
| process by which ocean floor sinks beneath a deep ocean trench and back into the mantle |
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Term
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Definition
| lighosphere is broken into these. they fit together along cracks in lithosphere |
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Definition
| a well tested concept that explains a wide range of observations |
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Term
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Definition
| pieces of the earth's lithosphere are in slow, constant motion, driven by convention currents in the mantle |
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Term
| theory of plate tectonics |
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Definition
| explains the formantion, movement and subduction of earth's plates. |
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Term
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Definition
| breaks in the earth's crust where rocks have slipped past each other form along these boundaries. |
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Definition
| place where 2 plates move aparat or diverge |
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Definition
| result when 2 plates come together or converge. |
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Definition
| place where 2 plates slip past each other, moving in opposite directions. |
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Term
| how have geologtists learned about Earrth's inner structure? |
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Definition
| direct evidence from rock samples and indirect evident from seismic waves. |
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