Earth

Question 1

. uniformitarianism

Answer 1

a priv=ciple that states the geologic processes that occured in the past can be explained by current geological process

Question 2

catastrophism

Answer 2

a priciple that states that geologic change change occurs suddenly

Question 3

paleontology

Answer 3

a dinosaur doctor

Question 4

relative dating

Answer 4

any meathod of determining whether an event or object is older or younger than other events or objecys

Question 5

absolute dating

Answer 5

the process of determining an age

Question 6

superposition

Answer 6

a principle of quantum theory that describes a challenging concept about the nature and behavior of matter and forces at the sub-atomic level.

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, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.

Question 8

radioactive decay

Answer 8

the process by which the nucleus of an unstable atom loses energy by emitting radiation

Question 9

half-life

Answer 9

the time required for a quantity to reduce to half 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

A fossil formed when an animal, plant, or other organism dies and is covered by sediment

Question 13

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

Answer 13

Cast

Question 14

unconformity

Answer 14

a surface of contact between two groups of unconformable strata

Question 15

mass extinction

Answer 15

a widespread and rapid decrease in the biodiversity on Earth.

Question 16

Jurassic period

Answer 16

the second segment of the Mesozoic Era.

Question 17

Cretaceous period

Answer 17

The Cretaceous Period was the last and longest segment of the Mesozoic Era. It lasted approximately 79 million years

Question 18

Devonian period

Answer 18

a geologic period and system of the Paleozoic Era, spanning 60 million years

Question 19

Quaternary period

Answer 19

divided into two epochs: the Pleistocene (2.588 million years ago to 11.7 thousand years ago) and the Holocene (11.7 thousand years ago to today).

Question 20

Permian period

Answer 20

lasted from 299 to 251 million years ago* and was the last period of the Paleozoic Era.