Term
| how do we know about the earth's interior? |
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Definition
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Term
| How are silica context and viscosity related? |
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Definition
| High silica is equal to high viscosity and Low silica is equal to low viscosity |
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Term
| what is the approx. distance from the surface to the center of the earth? |
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Definition
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Term
| Which layer in the earth does not transmit s-waves? |
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Definition
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Term
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Definition
| between 5 and 30 km. Continental toward 80 km |
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Term
| the partially molten layer beneath the lithosphere is called the : |
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Definition
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Term
| What element makes up most of the earth's core? |
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Definition
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Term
| What does the elastic rebound theory describe? |
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Definition
| maximum stress before rupture ( how earth bends and rebounds to original structure). |
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Term
| which if the following types of seismic waves arrive at a seismometer first? |
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Definition
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Term
Mt. Saint helens is associated with a ____ plate boundary.
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Definition
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Term
| how do rock particles move during the passage of a P wave through rock? |
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Definition
| rock particals move parallel to the wave. |
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Term
| what is the minimum number of seismograph stations needed to locate the epicenter of an earthquake? |
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Definition
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Term
| the energy released during a magnitude 8 earthquake is approx ____ times greater than the energy released during magnitude 6 earthquake. |
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Definition
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Term
how well can scientists predict earthquakes?
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Definition
| not very well---not there yet---no ability/technology to inform. |
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Term
| what particles are found in atoms |
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Definition
| electrons,protons and neutrons |
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Term
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Definition
| has same # of protons but # of neutrons differ |
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Term
| what mineral is the hardest known substance in nature? |
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Definition
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Term
| what is a dip slip fault? |
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Definition
| normal, reverse, and thrust faults |
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Term
| a cubic centimeter of quartz, olivine, and gold weigh 2.5 3.0 abd 19.8g respectively. This indicates that _____ |
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Definition
| gold has high density/ gravity |
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Term
| what was mohorovicic's major contribution to geology? |
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Definition
| suggested/ showed evidence that earth was layered known for moho---crust/mantic founder |
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Term
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Definition
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Term
| which region of earth is molten? |
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Definition
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Term
| which region of earth consists primarily of solid iron? |
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Definition
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Term
| in which region of earth does convection take place? |
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Definition
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Term
| what boundary did ingle lehmann discover? |
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Definition
| inner and outter core boundaries, BEANO---core mantle boundaries. |
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Term
| BOHENS REACTION SERIES. which mineral would you expect to see as a phenocryst n porphyritic basalt? |
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Definition
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Term
| which igneous rocks exhibit aphantic (fine grained) texture? |
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Definition
| basalt, anasite, ryalite, |
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Term
| igneous rock exhibits phaneritic ( course grained)texture |
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Definition
| gathro, diarite, granite. |
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Term
| a _____ texture indicates two distinctly different size of mineral grain. |
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Definition
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Term
| which igneous rock or magma has the lowest silica content? |
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Definition
| basalt or gabro----> 45%-53% |
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Term
| a _____ volcano is a large, gently sloping mound composed mainly of basaltic lava flows |
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Definition
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Term
| what shows the correct order of decreasing magma viscosity? |
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Definition
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Term
| which type of volcanoes comprises the cascade and andean ranges? |
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Definition
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Term
| which foundation material is the most stable during earthquake shaking? |
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Definition
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Term
| the ____ magnitude scale is a measure of the energy released. it does not directly measure the extent of building damage. |
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Definition
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Term
| THe _____ of the earth does not transmit s waves. |
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Definition
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Term
| given that the epicenter was more than 200 miles away, why was there such massive damage during the mexico city earthquake? |
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Definition
| amplified solid waves because subsurface was not as solid as bedrock |
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Term
| hardness scale was developed by? |
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Definition
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Term
| which is the first mineral and last mineral to crystallize out of a melt? |
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Definition
| alavine is first, quartz is last |
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Term
| Do earthquakes kill people? How do people die in earthquakes? |
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Definition
| No earthquakes do not kill people. The effects of earthquakes kill people i.e. falling buildings---floods. |
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Term
| WHat set off the eruption of Mt. St. helens |
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Definition
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Term
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Definition
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Term
| how did the krafts die, in dvd we watched? |
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Definition
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Term
| David Johnston, a 30 yr old volcanologist, was killed in 1980 mt. St. helen's eruption. what were his last words? |
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Definition
| Vancouver, Vancouver--this is it! |
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