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Details Title: Geology I Review Questions Description: Study Guide Total Flash Cards: 34 Created: 02/14/2006 11:59:41	To study from this set of flash cards, or to create your own your own study flash cards, register HERE. If you are already a registered user, CLICK HERE.
Cards Term What are seismic waves? Definition Vibrations in the Earth caused by Earthquakes. Term Give examples of direct and indirect observations. Definition Direct Examples: Taking samples, Cave Exploration, Drilling Indirect: Seismic waves, Vibrations in earth caused by earthquakes. Term How thick is the continental crust? Definition 35kilometers, or 35,ooo meters. Term How thick it the oceanic crust? Definition 7 kilometers or 7,000 meters. Term What are lithospheric plates? Definition Pieces of crust. Term Who was Andrija Mohorovicic? Definition He discovered the moho (the layer between the crust and the mantle). Term Where is the Moho layer? Definition Between the mantle and the crust. Term What is the Moho layer? Definition The transitional layer between the mantle and crust. 30 kms thick. Term Which elements make up the earths crust? Definition Silicon, oxygen, Aluminum, and Iron. Term Which elements make up the Earths Mantle? Definition Silicon, oxygen, and aluminum. Term How thick is earths mantle? Definition 2,900km or 2,900,000 meters. Term What is Plasticity? Definition The ability to flow. Term What is the temperature at the top of the mantle? Definition 870*C Term What is the temperature at the bottom of the mantle? Definition 2,200*C Term What are convection currents? Definition When heat rises and cold sinks. Term Why are convection currents important? Definition They are what moves the tectonic plates. Term How thick is the outer core? Definition 2,200 kms. Term What is the temperature of the outer core? Definition 5000* C Term Which layer of the Earth is a liquid? Definition Mantle Term How thick is the inner core? Definition 1270km thick Term What is the inner core composed of? Definition Nickel (NI) and Iron (FE) Term Why isn't the inner core a liquid? Definition The pressure of all the other rocks and stuff on top of it. Term Who propsed the theory of Continental Drift Definition Alfred Wegener Term Descibe the evidence that Wegener had to support his theory? Definition The rocks that were similar and the animals and the puzzle. Term Why wasn't Wegener theory accepted widely at the time? Definition He didn't know what force could move the plates. Term How is the modern Plate Techtonics Therory different than Wegener's? Definition we now know that convections currents Term How is the modern Plate Techtonics Therory different than Wegener's? Definition we now know that convections currents Term What is the Asthenosphere? Definition The upper part of the mantle that the plates float on. Term What are mid-ocean ridges? Definition a Mountian chain under the ocean along the edge of a plate usually. Term What are mid-ocean ridges? Definition a Mountian chain under the ocean along the edge of a plate usually. Term What is the Pangea? Definition The super continent 300 million years ago Term How long ago did the Pangea break up? Definition 225 million years ago Term What were Lurasia and Gondwanaland Definition 2 continents that were first made when Pangea split up. Term How do scientist locate the edges of the plates? Definition They record Earth quakes and volcanoes and then connect the dots.