Earth's Timeline

Fossils that are created by a thin layer of carbon left over after the organism decays.

• carbon fossil
• body fossil
• trace fossil
• relative dating

An era of geological history lasting from 65 million years ago to the present time in which there has been a rapid evolution of mammals and birds and of flowering plants.

• Cenozoic Era
• carbon fossil
• body fossil
• trace fossil

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

The history of life as documented by fossils, the remains or imprints of organisms from earlier geological periods preserved in sedimentary rock.

• fossil record
• Cenozoic Era
• carbon fossil
• body fossil

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

Remnants, impressions, or traces of an organism of a past geologic age that has been preserved in the earth's crust.

• fossils
• fossil record
• Cenozoic Era
• carbon fossil

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

A framework of chronological dating, which associates geological strata with time.

• geologic time scale
• fossils
• fossil record
• Cenozoic Era

Tags

NGSS.MS-ESS1-4

The amount of time it takes for half of the isotope in a sample to decay into its product isotope.

• half-life
• geologic time scale
• fossils
• fossil record

Tags

NGSS.HS-PS1-8

Fossil from organisms that make fossils easily, lived for a specific span of time, and over large geographic areas.

• index fossil
• half-life
• geologic time scale
• fossils

A form of an element that has the same number of protons but a different number of neutrons.

• isotope
• index fossil
• half-life
• geologic time scale

Tags

NGSS.HS-PS1-8

Law that states that within a sequence of layers of sedimentary rock, the oldest layer is at the base and the layers are progressively younger with ascending order in sequence.

• Law of Superposition
• isotope
• index fossil
• half-life

Tags

NGSS.MS-ESS1-4

An era of geologic history comprising the interval between the Permian and the Tertiary or the corresponding system of rocks that was marked by the presence of dinosaurs, marine and flying reptiles, ammonites, ferns, and gymnosperms and the appearance of angiosperms, mammals, and birds.

• Mesozoic Era
• Law of Superposition
• isotope
• index fossil

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

NGSS.MS-LS4-2