Earth History Vocabulary Crossword
                         
                         
                         
                         
                         
                         
                         
                         
                         
                         
                         
                         
                         
                         
                         
                         
                         
                         
                         
                         
                         
                         
 
 
Down: 1) is the process of determining an age on a specified chronology in archaeology and geology 3)  is a technique used to date materials such as rocks or carbon, in which trace radioactive impurities were selectively incorporated when they were formed. 5) the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock. 6) 'Recent life 8) is the science of determining past events' close order without determining their absolute age.10) extinct marine arthropod that occurred abundantly during the Paleozoic era, with a carapace over the forepart and a segmented hind part divided longitudinally into three lobes. Across: 2) the earliest of the geologic ages, which are marked by different layers of sedimentary rock 4) middle life' 7) the fact or process of a species, family, or other group of animals or plants becoming extinct. 9)  the development of planet Earth from its formation to the present day. 11) Is a representation of time-based on the rock record of Earth?
 

 

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