Geological Time Scale

Front

Current geological period:

Back

Cenozoic Era

Tags

NGSS.MS-ESS1-4

Front

When did jellyfish first appear?

Back

Precambrian Time

Front

Time period of Pangaea's appearance?

Back

Paleozoic Era

Front

Dinosaurs, small mammals, and birds existed in the Mesozoic Era.

Back

Mesozoic Era

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

Front

Youngest fossil?

Back

Fossil C

Tags

NGSS.MS-LS4-1

Front

Importance of studying fossils:

Back

Provides insights into how life and environmental conditions have changed.

Tags

NGSS.MS-LS4-1

Front

Branch of geology for sedimentary rock layers?

Back

Stratigraphy

Tags

NGSS.MS-ESS1-4

Front

Newest rock layers are on top unless disturbed. This is known as the...

Back

Law of Superposition

Tags

NGSS.MS-ESS1-4

Front

Determines the relative order of past events, not absolute age.

Back

Relative age

Tags

NGSS.MS-ESS1-4

Front

Decay of radioactive elements determines the __________ of a rock or fossil.

Back

Absolute age

Tags

NGSS.HS-PS1-8