3.1, 3.4, 3.5

Question 1

A principle that states that geologic processes that occurred in the past can be explained by current geologic processes.

Answer 1

Uniformitarianism

Question 2

A principle that states that geologic change occurs suddenly.

Answer 2

Catastropism

Question 3

The scientific study of fossils.

Answer 3

Paelontology

Question 4

To study the fossils of plants.

Answer 4

Paelobotanists

Question 5

The remains or physical evidence of an organism preserved by geologic processes

Answer 5

fossil

Question 6

A fossilized mark in soft sediment by the movement of an animal.

Answer 6

trace fossil

Question 7

A mark or cavity made in a sedimentary surface by a shell or other body.

Answer 7

mold

Question 8

A type of fossil that forms when sediments fill in the cavity lift be a decomposed organism.

Answer 8

cast

Question 9

A fossil that is found in the rock layers of only one geologic age and that is used to establish the age of the rock layers.

Answer 9

Index fossil

Question 10

The standard method used to divide the Earth’s long natural history into manageable parts.

Answer 10

Geologic time scale

Question 11

the largest division of geologic time

Answer 11

eons

Question 12

A unit of geologic time that includes two or more periods.

Answer 12

ears

Question 13

A unit of geologic time into which ears are divided.

Answer 13

periods

Question 14

A subdivision of a geologic period.

Answer 14

epochs

Question 15

the death of every member of a species.

Answer 15

Extinction

Question 16

14.6 billion years old

Answer 16

Earth’s age