Geologic Time

The biggest unit of time on the Geologic Time Scale is 

• an era

• a period

• an eon

• an epoch

Eras a broken into 

• eons

• periods

• epochs

• millions of years

Of the following organisms, which was around (or has been around) for the shortest amount of time?

• Dinosaurs

• Mammals

• Humans

• Reptile

Tags

NGSS.MS-LS4-1

The geologic time scale is divided by major changes or events such as

• mass extinctions

• the extinction of one species

• the development of one new species

• a small temperature change

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

Most volcanoes and earthquakes occur...

• along the coast

• along tectonic plate boundaries

• in the Arctic

• in the ocean

Tags

NGSS.MS-ESS3-2

a division of geologic time; a subdivision of a period. Shortest length of time.

• geologic time scale

• era

• period

• epoch

Tags

NGSS.MS-ESS1-4

when minerals replace the remains and they become rock; things like wood.

• Petrified

• Mold

• Cast

• Index

• Trace Fossil

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

fossilized mark that is formed in soft sediment by the movement or actions of an animal.

• Petrified

• Mold

• Cast

• Index

• Trace Fossil

What Era were mammals first seen?

• Precambrian

• Paleozoic

• Mesozoic

• Cenozoic

According to paleontologists, how old is the Earth?

• 3.5 Billion Years Old

• 543 Million Years Old

• 57 Million Years Old

• 4.6 Billion Years Old

Tags

NGSS.MS-ESS1-4