fossoil recerd

Question 1

uniformitarianism

Answer 1

the concept that the earth’s surface was shaped in the past by gradual processes

Question 2

catastrophism

Answer 2

the theory that changes in the earth’s crust during geological history have resulted chiefly from sudden violent and unusual events

Question 3

paleontology

Answer 3

the branch of science concerned with fossil animals and plants.

Question 4

relative dating

Answer 4

Relative dating is used to arrange geological events, and the rocks they leave behind, in a sequence.

Question 5

absolute dating

Answer 5

Relative dating is used to arrange geological events, and the rocks they leave behind, in a sequence

Question 6

superposition

Answer 6

the action of placing one thing on or above another, especially so that they coincide

Question 7

isotope

Answer 7

two or more types of atoms that have the same atomic number and position in the periodic table

Question 8

radioactive decay

Answer 8

the process by which an unstable atomic nucleus loses energy by radiation.

Question 9

half-life

Answer 9

the time required for a quantity to reduce to half of its initial value

Question 10

fossil

Answer 10

the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock

Question 11

trace fossil

Answer 11

a fossil of a footprint, trail, burrow, or other trace of an animal rather than of the animal itself

Question 12

mold

Answer 12

fungus that grows in the form of multicellular filaments called hyphae

Question 13

cast

Answer 13

replica of the external details of the structure of an old living organism left after its death in sedimentary rock

Question 14

unconformity

Answer 14

buried erosional or non-depositional surface separating two rock masses or strata of different ages

Question 15

extinction

Answer 15

the fact or process of a species, family, or other group of animals or plants becoming extinct

Question 16

Jurassic period

Answer 16

The Jurassic is a geologic period and stratigraphic system that spanned from the end of the Triassic Period 201.3 million years ago to the beginning of the Cretaceous Period

Question 17

Cretaceous period

Answer 17

The Cretaceous is a geological period that lasted from about 145 to 66 million years ago

Question 18

Devonian period

Answer 18

The Devonian is a geologic period and system of the Paleozoic, spanning 60.3 million years from the end of the Silurian

Question 19

Quaternary period

Answer 19

The Quaternary is the current and most recent of the three periods of the Cenozoic Era in the geologic time scale of the International Commission on Stratigraphy. It follows the Neogene Period

Question 20

Permian period

Answer 20

The Permian is a geologic period and stratigraphic system which spans 47 million years from the end of the Carboniferous Period 298.9 million years ago, to the beginning of the Triassic Period 251.9