Nina rahgozar Crossword
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
 
 
Down: 1) the period in the geologic time scale beginning about 248 million years ago and eneding about 65 million years ago2) determining the age of an object or event in years,usually by measuring the amount of unstable atoms in the sample3) the period in the geologic time scale beginning about 65 million years ago and continuing until the present day 4) describes a species of organism that has died out completely6) determining whether an event or object,such as a fossil,is older or younger than the other events or objects Across: 5) the division of Earths history into distinct intervals of time7) the solidified remains or imprints of a once-living organism8) the study of the forces that drive the movement of pieces of Earths crust around the surface of the planet 9) the period in the geologic time beginning about 570 million years ago and ending about 248 million years ago10) the period in geologic time scale beginning when Earth originated,4.6 billion years ago,and ending when complex organisms appeared,about 540 million years ago
 

 

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