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unit 7

QuestionAnswer
uniformitarianism the idea that the behavior of natural processes is more or less the same throughout the past, present, and future
fossil the remains or traces of organisms from the past that have been preserved by nature
trace fossil geological records of the activities and behaviors of past life
climate an area's long-term weather patterns
ice core cylinders of ice drilled out of an ice sheet or glacier
relative dating we determine which things are older or younger based on their relationships
superposition a particle can exist in multiple states at once — until it is observed
unconformity a break in time in an otherwise continuous rock record
geologic column a tool used by geologists to determine how an area has changed over geologic time
absolute dating a tool used by geologists to determine how an area has changed over geologic time
radioactive decay the emission of energy in the form of ionizing radiation
half-life the time it takes for the amount of a drug's active substance in your body to reduce by half
radiometric dating a technique which is used to date materials such as rocks or carbon, in which trace radioactive impurities were selectively incorporated when they were formed.
 

 



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