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unit 7 new newist

QuestionAnswer
uniformistism the process of thinking that geological processes that happened in the past can explain now
fossil A trace or remains from an organisms that live long ago commonly preserved in sediement
trace fossil a fossilized structure such as a footprint or a corplite that formed in sediementary rock by animal activity on or with soft sediementary
climate the weather conditions in an area over a long period
ice core A long cylinder of ice from drilling into the cap or sheet used for studing
relative dating any method of determining an object or organisms or event is younger or older than othe events.
superposition the principle that states younger rock is on the top and older rocks are on the bottom
uncomfority a break in geological layers cuased when layers are eridedd or when sediement is not deposited for a long time.
geological column rock layers based on the relative date of the rock where oldest is on the bottom.
absolute dating Any method of dating events or an object in years
radio active decay when radioactive isotopes breakdown and turn from a parent to a daughter isoptope to become more stable
half life the time required for half a sample of isotopes to breakdown and become a daughter isotopes.
radiotmetric dating Any method of determining the abuslute date of an object or event using the percentage of parent and daughter isotopes.
 

 



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