Geologic Time
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| 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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