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The Rock and Fossil Record

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The same geologic processes have been at work throughout Earth's history.   The principle of uniformitarianism  
THe principle that states that geologice change is sudden   Catastrophism  
The study of past life using fossils.   Paleontology  
Sciencetist who study past life using fossils.   Paleontologists  
Remains of organisms preserved by geologic processes   Fossils  
The study of the history of the Earth   Geology  
Most fossils are preserved in   Sedimentary Rock  
A missing layer of rock in a sequencing parallel rock layer   Disconformity  
The idea that younger rocks lie on top of older rocks.   Superposition  
A break in the geologic record.   Uncomformity  
The process of figuring out if an object is older or younger than another.   Relative Dating  
The process of wearing down.   Erosion  
A missing layer that exitsts between horizontal and folded rock layers.   Angular Unconformity  
A break in the Earth's crust.   Fault  
Process in which minerals replace tissues.   Mineral Replacement  
Unstable isotopes   Radioactive  
The process of figuring out how old an object is   Absolute dating  
The most common method of absolute dating   Radiometric Dating  
The time it takes for one-half of a radioactive sample to decay   Half-life  
The process in which radioactive isotopes break down into stable isotopes   Radioactive Decay  
Mark or Cavity   Mold  
Fossil from a specific time period   Index Fossil  
Fossil formed by an animal's movement   Trace Fossil  
mold filled with sediment   Cast  
What is hardened tree sap?   Amber  
Largest division of geologic time.   Eon  
Unit of geologic time that includes two or more periods   Era  
Third largest division of geologic time   Period  
Fourth largest division of geologic time   Epoch  
Death of a species   Extinction  
Standard method that divides Earth's history into parts   Geologic Time Scale  
A mark left by a dinosaur's tail would be considered a   Trace Fossil  
How many years of Earth's history do geologists study?   4.6 Billion Years  
To reconstruct Earth's climate history, Scientists drill out?   Ice Cores  


   






 
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Created by: stameykl