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PALEONTOLOGY CROSSWORD

SCIENCE : ansley morrow
Across
A fossil that is found in rock layers from only one geologic age and is used to established the age of the rock
Kinds of living things are thought to develope from earlier forms during history in the earth
A current era "age of mammals".
A term given to a variety of life on earth
An event or function reaction in an organ or in the tissue
The system of rocks deposited during it
A large group of organisms becoming extinct or disappearing
The layers of sediment are original deposited horizontally under the action of gravity
The theory that changes in the earths crust during geologic history have resulted from action of continuous and uniform processes
The background of something
A hypothetical super-continent that included all current land masses
The process in which new individual organisms giving off springs
The act of something dying out of the ecosistim
A marking or cavity made sedimentary rock by a shell or other body parts
An organic object that has been turned to stone
A type of fossil that forms when sediments fill in the cavity left by a decomposed orgamism
Down
The principle that states that younger rocks lie above older rock if the layers have not been disurbed
This can trap animals because the petroleum seep leaks to the surface leaving only the thick asphalt.
When an organism is classified or the act of classifying
A way in which organisms are fossilized and preserved in sticky tree sap
A way in which organisms have been fossilized by being trapped and preserved in sticky thick pools
The organisms that are adapted better to the environment that survive tend to give more offspring's
Geologic time that tells you the cross-references of rocks.
A unit of geologic time
Any method of measuring the age of an event or object in years.
A group of living things that are a group that are similar to each other
A TRACE OR REMAINS OF ORGANISMS THAT LIVED LONG AGO
A species that is no longer in existence