fossil record

Question 1

uniformitarianism

Answer 1

the theory that changes in the earth’s crust during geological history have resulted from the action of continuous and uniform 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

paleontology

Question 4

relative dating

Answer 4

relative order of past events

Question 5

absolute dating

Answer 5

process of determining an age on a specified chronology in archaeology and geology.

Question 6

superposition

Answer 6

property, states that, for all linear systems, the net response at a given place and time caused by two or more stimuli is the sum of the responses

Question 7

isotope

Answer 7

Isotopes are variants of a particular chemical element which differ in neutron number.

Question 8

radioactive decay

Answer 8

an unstable atomic nucleus loses energy by emitting radiation

Question 9

half-life

Answer 9

a radioactive substance is the amount of time it takes for half of its atoms to decay

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

geological record of biological activity. Trace fossils may consist of impressions made on the substrate by an organism

Question 12

mold

Answer 12

A mold or mould is a fungus that grows in the form of multicellular filaments called hyphae.

Question 13

cast

Answer 13

A fossil formed when an animal, plant, or other organism dies, its flesh decays and bones deteriorate due to chemical reactions

Question 14

unconformity

Answer 14

a surface of contact between two groups of unconformable strata.

Question 15

mass extinction

Answer 15

extinction event is a widespread and rapid decrease in the biodiversity on Earth.

Question 16

Jurassic period

Answer 16

56 million years from the end of the Triassic Period 201.3 million years ago to the beginning of the Cretaceous Period 145 Mya.

Question 17

Cretaceous period

Answer 17

began 145.0 million years ago and ended 66 million years ago; it followed the Jurassic Period

Question 18

Devonian period

Answer 18

60 million years from the end of the Silurian, 419.2 million years ago,

Question 19

Quaternary period

Answer 19

(2.588 million years ago to 11.7 thousand years ago

Question 20

Permian period

Answer 20

46.7 million years from the end of the Carboniferous Period 298.9 million years ago