Geo Midterm 1 - Geology Exam 1 Formation of the Universe...

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Geology – Exam 1Formation of the Universe – Chapter 1?1)Humans significantly alter Earth’s processesa)Geologic records help show thisb)Earth Scientists play a role in helping develop public policy (research &regulation)2)Formation of the Eartha)Big Bang – 14 billion years agob)Universe is still expandingc)All matter began as H and He (nuclear processes created all heavier elements)d)Earth – 4.6 billion years old3)Solar System Formationa)Develops from clouds of dust and debris (nebula)b)Gravity draws gas to center4)Birth of Planetsa)Driven by gravityb)Planets accrete, compress and differentiatec)Plates = iron close to sunc.i) Further – intermediate mass elements: Si, O, Mgc.ii)Even Further – elements with REALLY low boiling points (frozen gasCH4) Large, outer planets5)Searching for Other Planetsa)Kepler Telescopeb)Found over 130 exoplanets6)Formation of the Earth – Density Stratification
a)Heavier elements were drawn to the Earth’s center by gravity (lighter elementscame near the surface)7)Structure8)Density
Plate Tectonics
9)The Crusta)Thin, variablea.i) Continental crust is thicker (20-100km)a.ii)Oceanic Crust (5-10km)b)Continental Crustb.i)Young to 4 billion years oldb.ii)Avg comp: rock called granodioriteb.iii)About 2.7 g/cm3
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c)Oceanic Crustc.i) Fresh to 180 million years oldc.ii)Avg comp: Basalt (a mafic igneous rock)c.iii)Avg Density: 3.0 g/cm3c.iv)EARTHS CORE IS 10/13 g/cm310) Physiographic Landforms11) Craton – the stable core of a continent
a)Shield: old, crystalline rockb)Covered shield: sediments and sedimentary rocks lie on top of the shield12) Folded Mountains
13) Continental Rift System
14) Continental Shelf15) Abyssal Plains
a)4000 m below sea levelb)broad plains with little reefs
16) Seamontsa)Volcanoes that pop up on abyssal plain (Hawaii)

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Term
Spring
Professor
Miller
Tags
Sedimentary rocks, magmas
We have textbook solutions for you!
The document you are viewing contains questions related to this textbook.
Intermediate Algebra Within Reach
The document you are viewing contains questions related to this textbook.
Chapter 3 / Exercise 64
Intermediate Algebra Within Reach
Larson
Expert Verified

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