Eons, Eras, Periods, and Epochs of the Earth

Origin of Earth

(a)  

Tags

NGSS.HS-ESS1-6

Oldest known rocks on Earth's surface

Note: Answer should be "Between Eon and Eon"

(a)  

Tags

NGSS.HS-ESS1-6

Oldest fossils of cells (prokaryotes appear)

(a)  

Concentration of atmospheric oxygen begins to increase

(a)  

Tags

NGSS.MS-LS4-4

NGSS.MS-LS1-6

Oldest fossils of eukaryotic cells appear

(a)  

Tags

NGSS.MS-ESS1-4

Diverse algae and soft-bodied invertebrate animals appear (Answer as "Period-Eon")

(a)  

Sudden increase in diversity of many animal phyla (Cambrian explosion)

Note: Your answer should be in the format "Period-Era-Eon"

(a)  

Tags

NGSS.MS-LS4-1

Marine algae abundant; colonization of land by diverse fungi, plants, and animals.

Note: Your answer should be in the format "Period-Era-Eon"

(a)  

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

Diversification of early vascular plants

Note: Your answer should be in the format "Period-Era-Eon"

(a)  

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

NGSS.MS-LS4-2

Diversification of bony fishes, first tetrapods and insects appear.

Note: Your answer should be in the format "Period-Era-Eon"

(a)  

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

NGSS.MS-LS4-2