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Fossils
Fossils 2
Preservation/Index Fossils
Geologic /Trilobites/Relative Age
Relative/Absolute Age
100
Scientist who studies fossils.
What is paleontologist.
100
Thin film is left forming a silhouette of the original organism.
What is carbon film.
100
Fossilized tracks and other evidence of activity.
What is trace fossils.
100
small, hard shelled organisms that crawled on the seafloor and swam through water.
What is trilobites
100
Gaps in rock sequences. Occur when erosion removes layers of rock.
What is Unconformity.
200
Remains, imprints or traces of prehistoric organisms.
What is fossils.
200
Plant matter accumulates and forms this over millions of years.
What is coal.
200
The remains of species that existed on Earth for relatively short periods of time, were abundant, and were widespread geographically.
What is index fossils.
200
The division of Earth’s history
What is geologic time scale.
200
The age in years, of a rock or other object.
What is absolute age.
300
How fossils form?
What is when sediment covers it before the scavengers get it.
300
The hard part of an organism decays and leaves behind a cavity in the rock.
What is mold.
300
Made by worms and other animals tell us how the ground was back then.
What is trails and burrows.
300
What are the three lobes of a trilobite?
What is Head (cephalon), Middle Section (Thorax), Tail (Pygidium).
300
The breaking down process of an isotope.
What is radioactive decay.
400
Scavengers are less likely to eat...
What is bones, shells, teeth.
400
Mineral-rich water or sediments enter the cavity and produce a copy of the original organism.
What is cast.
400
What do scientists use fossils for?
What is to determine what the environment was like back then.
400
Oldest rocks on bottom and they become progressively younger toward the top.
What is principle of superposition.
400
The time it takes for half of the atoms in an isotope to decay.
What is half-life.
500
Fossils where spaces in the bone is filled with minerals or groundwater.
What is permineralized remains.
500
When conditions allow for parts of the organism to be preserved for millions of years.
What is original remains.
500
How many preservation types are there?
8
500
The age in comparison to the age of other things (fossils).
What is relative age.
500
States that the Earth's processes (events) occurring today are similar to those that occurred in the past on Earth.
What is uniformitarianism