Mod D Unit 1 Lesson 1 The Fossil Record
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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Fossil | the remains or traces of once-living organisms.
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Sedimentary Rock | types of rock that are formed by the deposition and subsequent cementation of that material at the Earth's surface and within bodies of water.
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Law of Superposition | states that in a sequence of undisturbed sedimentary rocks, the oldest layers are at the bottom and the youngest ones are at the top.
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Geologic Columns | an ordered arrangement of rock layers that is based on the relative ages of the rocks, with the oldest rocks at the bottom of the column.
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Index Fossil | a widely distributed fossil, of narrow range in time, regarded as characteristic of a given geological formation, used especially in determining the age of related formations.
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Radiometric Dating | the method of finding the absolute age of rock based on comparing the amounts of unstable, radioactive particles to stable particles in a sample.
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Geologic Timescale | divides Earth’s history into intervals of time defined by major events or changes on Earth.
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Fossil Record | the collection of all known fossils and their placement in order from earliest to most recent.
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Extinction | when all members of a species die out.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
howellr
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