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Unit 3 Vocab

Hannah Pereny: Period 6
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Across
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THE BREAKDOWN OF A RADIOACTIVE ISOTOPE INTO A STABLE ISOTOPE OF THE SAME ELEMENT OR OF ANOTHER ELEMENT.
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THE TRACE OR REMAINS OF AN ORGANISM THAT LIVED LONG AGO MOST COMMONLY PRESERVED IN SEDIMENTARY ROCK.
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THE PRINCIPLE THAT STATES YOUNGER ROCKS LIE ABOVE OLDER ROCKS IF THE LAYERS HAVE NOT BEEN DISTURBED.
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STATES THAT GEOLOGIC PROCESSES THAT HAPPENED IN THE PAST CAN BE EXPLAINED BY CURRENT GEOLOGIC PROCESSES .
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WHEN SCIENTISTS DRILL DOWN INTO ICECAPS TO COLLECT A LONG CYLINDER OF ICE
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AN ORDERED ARRANGEMENT OF ROCK LAYERS THAT IS BASED ON THE RELATIVE AGES OF ROCKS.
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A FOSSILIZED STRUCTURE THAT FORMED IN SEDIMENTARY ROCK BY ANIMAL ACTIVITY OR IN SOFT SEDIMENT
Down
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DESCRIBES THE WEATHER CONDITIONS IN AN AREA OVER A LONG PERIOD OF TIME.
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DETERMINING THE ACTUAL AGE OF AN EVENT OR OBJECT IN YEARS.
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FINDING THE ABSOLUTE AGE OF A SAMPLE BY DETERMINING THE RELATIVE PERCENTAGES OF A RADIOACTIVE PARENT ISOTOPE AND A STABLE DAUGHTER ISOTOPE
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DETERMINING WHETHER AN OBJECT OR EVENT IS OLDER OR YOUNGER THAN OTHER OBJECTS OR EVENTS
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THE TIME NEEDED FOR HALF OF A SAMPLE OF RADIOACTIVE SUBSTANCE TO UNDERGO RADIOACTIVE DECAY TO FORM DAUGHTER ISOTOPES
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A BREAK IN THE GEOLOGIC RECORD THAT IS MADE WHEN ROCK LAYERS ARE ERODED OR WHEN SEDIMENT IS NOT DEPOSITED FOR A LONG PERIOD OF TIME.