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Planets Final #1
Test 1 Questions
|Which type of rock can NOT be convertd into one of the other types?
|Any of them can be converted into any of them
|If you observe an angular conformity, you would infer that the region has experienced:
|uplift and tilting of sedimentary units that exposes them to erosion over a period of time
|Which of the following layers in the Earth has the highest density?
|Describe Hawaiian vocalnoes:
|They are situated in the interior of a large, Pacfic plate above a hot spot deep in the mantle
|Compared to oceanic crust, continental crust is;
|thicker and older
|If the Earth did not have plate tectonics, which of the following would probably not be found?
|In correct order from the center outward, Earth includes which units?
|inner core, outer core, mantle, crust
|The Andes Mountains in South America are formed by:
|In order, what are the most abundant elements in Earth's crust (2)?
|oxygen and silicon
|Motion in a P-wave is:
|Which 2 elements combine to make most of the common rock forming minerals in the crust?
|silicon and oxygen
|If you observe a NONCONFORMITY, you would infer that the region had experienced:
|deposition of sedimentary layers on igneous or metamorphc rocks that are exposed at the surface of the earth
|THe composition of the earth's inner core is thought to be?
|solid iron-nickel alloy
|Which of the following areas is LEAST likely to experience an earthquake?
|The athenosphere is actually part of which layer of earth?
|Which type of lava has the lowest viscosity?
|What is the difference between "lava" and "magma"?
|It is just a name change; and lava is what magma is called if it reaches the surface of the Earth
|The largest percentage of total magma production on earth occurs at what plate tectonic setting?
|Which layer of the Earth is the thinnest?
|Which of the following plates is getting significantly smaller?
|The Hawaiian Island-Emperor Seamount chain is formed as a result of:
|hot spot activity
|The position on Earth's surface directly above the earthquake source:
|Which type of plate boundary is NOT commonly associated with widespread volcanic activity?
|continental divergent boundaries
|If magma or lava cools quickly, the resulting igneous rocks will have:
|very small crystals
|Where on Earth might you find a shield volcano?
|At a hot spot where basaltic lava is flowing; Hawaii or Iceland
|Convergent plate boundaries are:
|sites where cold, downgoing convective cells, the plates, descent into the mantle
|What medium will the different wave types go through?
|P and S waves will go through solids, P waves travel through liquids
|Volcano type that are short lived volcanoes that last a few days to months then shut down:
|OCeanic crust is composed primarily of
|What is the major volatile constituent in both magmas and volcanic gases?
|Silts and clays are commonly deposited in lakes, lagoons, swamps, and marine environments because:
|those settings have relatively still water
|The athenosphere is a layer of the Earth characterized by:
|soft rocks that flow easily
|In the course of a year, how far will a tectonic plate typically move?
|Tectonic boundary found at an ocean trench:
|convergent continental-oceanic OR oceanic-oceanic
|Tectonic boundary found at an ocean ridge:
|Tectonic boundary found at a rift valley:
|Oceanic crust is generated at:
|After 3 half-lives, how much of an original, radioactive, parent isotope remains?
|A transform boundary is characterized by:
|a deep, vertical fault along which two plates slide past one another in opposite directions
|Volcano A erupts rocks with SiO2 content ranging from 49% to 52% whereas volcano B, 100km away, erupts material with a SiO2 content of 62%-68%. What kind of volcanoes are these?
|Volcano A is probably a shield volcano with typically quiescent eruptions, whereas Volcano B is likely a stratovolcano characterized by violent, explosive eruptions.
|Which ocean formed as a direct result of the breakup of Pangea?
|Where on the Earth might you find a continent-continent convergent plate boundary?
|What type of volcanic material is indicative of eruption under water?
|The lithosphere is the outer layer of the earth characterized by:
|hard rocks that break
|Oceanic crust is destroyed at:
|convergent plate margains
|All of the earth's ocean basins are:
|less than 200 million years old
|What tends to increase the explosive potential of a magma body beneath a volcano?
|high viscosity and dissolved gas
|If you observe a disconformity, you would infer that the region had experienced:
|deposition in shallow water, uplift or lowering of sea level enough to expose the rocks to erosion and non-deposition for a period of time
|Which of the following organisms would be most likely to be preserved in the geologic record?
|a clam with a thick calcite shell that lived on a mudflat
|What is the age of the Earth accepted by most scientists today?
|4.6 billion years