Earth's Biological History Vocabulary

Front 1

Fossil

Back 1

Remains of a living thing from the past

Hint 1

Front 2

Organisms

Back 2

A living thing

Hint 2

Front 3

Cast Fossils

Back 3

When a fossil is created by

chemical reactions

Hint 3

Front 4

Mold Fossil

Back 4

When dead organisms covered in

sediments turn into fossils

Hint 4

Front 5

Trace Fossil

Back 5

Fossils that shows tracks like earthquakes

Hint 5

Front 6

Petrified/Permineralized Fossil

Back 6

When water seeps in and leaves only hard minerals

Hint 6

Front 7

Preserved Fossil

Back 7

A fossil that has been saved

Hint 7

Front 8

Carbonized Fossil

Back 8

To save the fossil with no air flow

Hint 8

Front 9

Fossil Record

Back 9

The placement of fossils in the

earth

Hint 9

Front 10

Diversity

Back 10

A range of different things

Hint 10

Front 11

Relative age

Back 11

Approximate age

Hint 11

Front 12

Absolute age

Back 12

Exact age

Hint 12

Front 13

Index fossils

Back 13

Many of the same fossil must be found over a wide area

Hint 13

Front 14

Law of Superposition

Back 14

Tells scientists how old the Earth,rocks, and fossils are

Hint 14

Front 15

Trilobites

Back 15

An index fossil that became extinct about 245 million years ago

Hint 15

Front 16

Geologic Time Scale

Back 16

Record of the major events and diversity of life forms present in Earths History

Hint 16

Front 17

Era

Back 17

A subdivision of an Eon

Hint 17

Front 18

Period

Back 18

A length of portion of time

Hint 18

Front 19

Epoch

Back 19

A period of time in history or a persons life

Hint 19

Front 20

Precambrian Eon

Back 20

Earliest span of time in Earths history

Hint 20

Front 21

Paleozoic Era

Back 21

Sudden increase in the diversity of many animal phyla

Hint 21

Front 22

Mesozoic Era

Back 22

Increase in Reptiles

Age of Dinosaurs!!!

Hint 22

Front 23

Cenozoic Era

Back 23

Humans appeared

Hint 23

Front 24

Quaternary period

Back 24

Geologic time period that

encompasses the most recent 2.6 million years

Hint 24

Front 25

Holocene epoch

Back 25

Started some 11,500 years ago when the glaciers began to

retreat

Hint 25

Front 26

Natural Selection

Back 26

The process that explains how species can change over time.

Hint 26

Front 27

Adaptation

Back 27

Trait or behavior that helps an organism survive.

Hint 27

Front 28

Variation

Back 28

Differences that exist among populations of species.

Hint 28

Front 29

Population

Back 29

Group of same organism

Hint 29

Front 30

Species

Back 30

Type of organism

Hint 30