Fossils Crossword

a scientist who studies fossils
Rock that has formed through the deposition and solidification of sediment, especially sediment transported by water, ice, and wind.
the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.
form when minerals replace the structure of an organism.
A fossil formed when an animal, plant, or other organism dies and is covered by sediment, its flesh decays and bones deteriorate due to chemical reactions, and a cavity remains below the ground surface.
A fossil formed when an animal, plant, or other organism dies, its flesh decays and bones deteriorate due to chemical reactions
is an organism outline of a fossil
a fossil of a footprint, trail, burrow, or other trace of an animal rather than of the animal itself.
one that remains intact, or nearly intact, because of the method in which it was fossilized.
geologic materials by measuring the presence of a short-life radioactive element
The geologic age of a fossil organism, rock, geologic feature, or event, defined relative to other organisms, rocks, features, or events rather than in terms of years.
Relative dating is the science of determining the relative order of past events
a fossil that is useful for dating and correlating the strata in which it is found.
an 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.
The geologic age of a fossil, or a geologic event or structure expressed in units of time, usually years. Also known as actual age.
a method of dating geological or archeological specimens by determining the relative proportions of particular radioactive isotopes present in a sample.
Radioactive decay is the process by which an unstable atomic nucleus loses energy by radiation
the time taken for the radioactivity of a specified isotope to fall to half its original value.