fossil record

Question 1

uniformitarianism

Answer 1

the theory that changes in the earth’s crust

Question 2

catastrophism

Answer 2

a principle that states that geologic change occurs suddenly

Question 3

paleontology

Answer 3

the scientific study of fossils

Question 4

relative dating

Answer 4

any method of determining when an event or object is older or younger than other events or objects

Question 5

absolute dating

Answer 5

any method of measuring the age of an event or object in years

Question 6

superposition

Answer 6

a principle that states that younger Rock lie above older rocks if the layers have not been Disturbed

Question 7

isotope

Answer 7

an atom that has the same number of protons as other atoms of the same element doing but that has a different number of neutrons

Question 8

radioactive decay

Answer 8

the process in which a radioactive isotope tends to break down into a stable isotope of the same element or another element

Question 9

half-life

Answer 9

the time it takes for one-half of a radioactive element to decay into a daughter isotope.

Question 10

fossil

Answer 10

The Remains are physical evidence of an organism preserved by geological process

Question 11

trace fossil

Answer 11

a fossilized mark that is formed in soft sediment by the movement of an animal

Question 12

mold

Answer 12

a Mark or cavity made in a sedimentary Surface by a show or another body

Question 13

cast

Answer 13

the type of fossil that forms from sediments fill in the cavity left by a decomposed organism

Question 14

unconformity

Answer 14

a break in the geologic record created when Rock layers are eroded or when sediment is not deposited for a long period Of time

Question 15

mass extinction

Answer 15

when lots of things go extinct at once

Question 16

Jurassic period

Answer 16

geologic period and system that spanned 56 million years

Question 17

Cretaceous period

Answer 17

The Cretaceous is defined as the period between 145.5 and 65.5 million years ago

Question 18

Devonian period

Answer 18

The Devonian is a geologic period and system of the Paleozoic, spanning 60 million years

Question 19

Quaternary period

Answer 19

Quaternary is current and most recent of the three periods of the Cenozoic Era in the geologic time scale

Question 20

Permian period

Answer 20

geologic period and system which spans 47 million years