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Unit 3 Vocab

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