fossil record Flashcards
(20 cards)
- uniformitarianism
the theory that changes in the earth’s crust during geological history have resulted from the action of continuous and uniform processes.
- catastrophism
the theory that changes in the earth’s crust during geological history have resulted chiefly from sudden violent and unusual events.
- paleontology
the branch of science concerned with fossil animals and plants.
- relative dating
Relative dating is the science of determining the relative order of past events
- absolute dating
Absolute dating is the process of determining an age on a specified chronology in archaeology and geology.
- superposition
In physics and systems theory, the superposition principle, also known as superposition property,
- isotope
Isotopes are versions of an atom or an element that have the same number of protons, but different numbers of neutrons. Isotopes and isotope notation are particularly important in nuclear chemistry.
- radioactive decay
is the process by which the nucleus of an unstable atom loses energy by emitting radiation
- half-life
Half-life (abbreviated t1⁄2) is the time required for a quantity to reduce to half its initial value.
- fossil
the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.
- trace fossil
a fossil of a footprint, trail, burrow, or other trace of an animal rather than of the animal itself.
- mold
it is the rotting of stuff
- cast
A fossil formed when an animal, plant, or other organism dies, its flesh decays and bones deteriorate due to chemical reactions; minerals gradually enter into the cavity, resulting in a cast, also called a mold fossil, which is in the general form of the original organism.
- unconformity
a surface of contact between two groups of unconformable strata.
- mass extinction
the ending of all aniaml ad]]nd human lie
- Jurassic period
dinusour period aka movie
- Cretaceous period
The Cretaceous Period was the last and longest segment of the Mesozoic Era. It lasted approximately 79 million years, from the minor extinction event that closed the Jurassic Period about 145.5 million years ago to the Cretaceous-Paleogene (K-Pg) extinction event dated at 65.5 million years ago.
- Devonian period
The Devonian is a geologic period and system of the Paleozoic Era, spanning 60 million years from the end of the Silurian Period, about 419.2 million years ago (Mya), to the beginning of the Carboniferous Period, about 358.9 Mya. It is named after Devon, England, where rocks from this period were first studied
- Quaternary period
were the world divide in to a two contry
- Permian period
The Permian period lasted from 299 to 251 million years ago* and was the last period of the Paleozoic Era.
