Clues To Earth's Past

Front 1

element found in the tissues of most organisms

Back 1

carbon

Front 2

Which branch of a network-tree concept map would contain the following terms: insect, crystallized resin, amber, wooly mammoth, frozen ground?

Back 2

original remains

Front 3

Principle stating that Earth's processes occurring today are similar to those that occurred in the past

Back 3

uniformitarianism

Front 4

fossils of species that existed for short periods and were widespread

Back 4

index fossils

Front 5

Remains, imprints or traces of once living organisms

Back 5

Fossils

Front 6

cavity in rock made when an organism decayed

Back 6

mold

Front 7

formed when original materials in skeletal remains are replaced by minerals

Back 7

petrified remains

Front 8

process that occurs when the number of protons in an atom is changed and a new element is formed

Back 8

radioactive decay

Front 9

water and quartz is flowing through bones

Back 9

a solution

Front 10

states that in a sequence of undisturbed rocks, the oldest rocks are on the bottom and the rocks become progressively younger toward the top

Back 10

principle of superposition

Front 11

Method used to determine the order of events and relative ages of rocks by examining the position of rocks in a sequence

Back 11

relative dating

Front 12

Method using properties of atoms in rocks and other objects to determine their ages

Back 12

Absolute Dating

Front 13

consume the body

Back 13

scavengers

Front 14

What dinosaurs became when there were no longer any living members of their species

Back 14

Extinct

Front 15

dissolves the calcium in the bones

Back 15

water

Front 16

method by which a geologist can calculate the absolute age of the rock by knowing the half life of an isotope

Back 16

radiometric dating

Front 17

gaps found in rock records

Back 17

unconformities

Front 18

kind of decay or change in which a new element eventually forms

Back 18

radioactive

Front 19

takes the place of calcium

Back 19

quartz

Front 20

actual organism or parts of organism protected from decay

Back 20

original remains

Front 21

branch of Science that includes the study of rocks and fossils

Back 21

geology

Front 22

fossil thin layer of carbon atoms and molecules

Back 22

carbonaceous film

Front 23

Method of dating rocks when the amounts of parent and daughter materials are measured

Back 23

Half Life

Front 24

produced when sediments fill in a cavity made when objects decay

Back 24

cast

Front 25

cause soft parts to decay

Back 25

bacteria