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Geologic Time

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Question
Answer
Geologic Time Scale -   show
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show Layers of different rock types  
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Eon -   show
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Eras -   show
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Period -   show
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Epoch -   show
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James needs to write a report which will describe the ups and downs of mammals in a previous time period. Which should he use, eons or epochs? Why?   show
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Why do many geologists study layers of strata?   show
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The Triassic, the Jurassic, and the Cretaceous _____ make up the Mesozoic era   show
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James needs to write a report which will describe the ups and downs of mammals in a previous time period. Which should he use, eons or epochs? Why?   show
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show Mammels  
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show They want to learn more about the history of the Earth  
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show An eon spans hundreds to thousands of millions of years, while eras span tens to hundreds of millions of years  
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show Helped establish our current understanding of the history of Earth. He studied sedimentary rocks, began comparitive anatomy, named the pterodactyl  
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The Triassic, the Jurassic, and the Cretaceous _____ make up the Mesozoic era   show
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James Hutton -   show
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show The theory that Earth's features are mostly accounted for by gradual, small-scale processes that occurred over long periods of time  
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show Mammels  
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show An eon spans hundreds to thousands of millions of years, while eras span tens to hundreds of millions of years  
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show Helped establish our current understanding of the history of Earth. He studied sedimentary rocks, began comparitive anatomy, named the pterodactyl  
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show The theory that Earth's features are mostly accounted for by violent, large-scale events that occurred in a relatively short amount of time  
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show Thought that most of the features on the surface of the Earth were formed by slow, ongoing, geologic processes  
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show The theory that Earth's features are mostly accounted for by gradual, small-scale processes that occurred over long periods of time  
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show uniformitarianism; catastrophism  
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James Hutton's theory of _____ earned him the title of 'The Father of Modern Geology.'   show
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show violent, short-lived natural events  
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show older  
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show The catastrophes in the Bible seemed to be on such large scales that they could account for the creation of things like mountains  
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show Scientists compare different layers of rock to determine an ordered sequence of events in geologic history  
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show The way rock layers are built up and changed by geologic processes  
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show A method in which scientists compare fossils in different rock strata to determine the relative ages of each  
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show Emission of energetic particles to produce new elements  
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Radiometric Dating -   show
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Rock Strata A contains Fossil X. It is below Rock Strata C which contains Fossil Z. Rock Strata B contains Fossil Y. It is above Rock Strata C. Which of the following is the correct order of the fossils (from oldest to youngest)?   show
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show Layers  
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show Radioactive decay  
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show Relative dating  
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show Numerical dating  
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show States that all rock layer were originally horizontal  
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show The youngest rock layers are closest to the top  
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Principle of Cross-Cutting Formations -   show
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show Foreign bodies of rock or mineral enclosed within another rock. Inclusions are always older than the sedimentary rock within which they're found  
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show Interfaces between discontinuous layer of rock  
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show Younger than  
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show An unconformity  
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show Sedimentary  
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show B, C, A  
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show Older than  
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Radiometric dating (also known as radioactive dating) -   show
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show The process by which an unstable atomic nucleus loses energy by releasing radiation  
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show The unstable nuclide that undergoes radioactive decay  
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show The nuclide that results from radioactive decay  
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Alpha decay -   show
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show A type of radioactive decay where a beta particle is emitted  
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Alpha particle -   show
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Beta particle -   show
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Gamma decay -   show
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Gamma ray -   show
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show The known decay rate of radioactive isotopes within the rocks  
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show Gamma Decay  
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show Alpha Decay  
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show Radioactive decay  
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Half-life -   show
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show Stone from a 1,000-year-old settlement  
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Which of the following terms is used to describe the process by which an unstable atomic nucleus loses energy by releasing radiation?   show
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show Half-life  
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show Uranium-238 decays to lead-206; uranium-235 decays to lead-207  
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show The half-life of carbon-14 is 5,730 years, and carbon-14 decays into nitrogen-14  
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