rock and fossil

Question 1

uniformitarianism

Answer 1

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

Question 2

catastrophism

Answer 2

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

Question 3

paleontology

Answer 3

the branch of science concerned with fossil animals

Question 4

relative dating

Answer 4

Relative dating is the science of determining the relative order of past event

Question 5

absolute dating

Answer 5

Absolute dating is the process of determining an age on a specified chronology in archaeology

Question 6

superposition

Answer 6

also known as superposition property

Question 7

isotope

Answer 7

each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei

Question 8

radioactive decay

Answer 8

is the process by which an unstable atomic nucleus loses energy

Question 9

half-life

Answer 9

the time taken for the radioactivity of a specified isotope to fall to half its original 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

is a fungus that grows in the form of multicellular filaments called hyphae

Question 13

cast

Answer 13

an object made by shaping molten metal or similar material in a mold

Question 14

unconformity

Answer 14

the condition of being unconformable

Question 15

mass extinction

Answer 15

is a widespread and rapid decrease in the biodiversity on Earth

Question 16

Jurassic period

Answer 16

was a geologic period and system that spanned 56 million years from the end of the Triassic Period

Question 17

Cretaceous period

Answer 17

was the last and longest segment of the Mesozoic Era

Question 18

Devonian period

Answer 18

system of the Paleozoic

Question 19

Quaternary period

Answer 19

is divided into two epochs the pleistocene

Question 20

Permian period

Answer 20

is a geologic period and system which spans 47 million years from the end of the Carboniferous Period