Geologic Timescale

What are the classifications from the largest to narrowest unit of time on the geologic time scale?

• era, period, eon

• eon, era, period, epoch

• era, eon, epoch, period

• eon, era, epoch, period

The Cenozoic is

• an eon

• an era

• a period

• an epoch

The Phanerozoic is

• an eon

• an era

• a period

• an epoch

Tags

NGSS.MS-ESS1-4

The epoch we are currently living in is the

• Holocene

• Quaternary

• Cambrian

• Pleistocene

Tags

NGSS.MS-ESS1-4

The Ordovician Period spanned from

• 488-542 mya

• 444-488 mya

• 416-444 mya

Tags

NGSS.MS-ESS1-4

The Cretaceous Period spanned from

• 65.5- 146 mya

• 146-200 mya

• 23.0-65.5 mya

Tags

NGSS.MS-ESS1-4

The Paleozoic Era spanned from

• 65.5-251 mya

• 359-542 mya

• 251-542 mya

Tags

NGSS.MS-ESS1-4

During which two periods did MASS extinctions occur?

• Archaean & Cambrian
• Cambrian & Mississippian
• Pennsylvanian & Permian
• Permian & Cretaceous

Tags

NGSS.HS-LS4-5

Most of the oceanic oxygen that began to enter Earth's atmosphere in the early Proterozoic Era was probably produced by:

• formation of silicate rocks

• impact events on Earth's surface

• outgassing from volcanoes

• photosynthesis by cyanobacteria

Tags

NGSS.MS-LS1-6

Flora is __________ and fauna is ________.

• Plants; Animals
• Animals; Plants
• Prokaryotes; Eukaryotes
• Water dwellers; Land dwellers