Geologic Time through Precambrian

What is the geologic timetable?

• A calendar of human history

• A summary of major events in Earth's history preserved in the rock record

• A list of future geological events

• A timetable for volcanic eruptions

Tags

NGSS.MS-ESS1-4

What are the 4 major divisions of time?

• Days, Weeks, Months, Years

• Eon, Eras, Periods, Epochs

• Hours, Minutes, Seconds, Milliseconds

• Centuries, Decades, Years, Months

Tags

NGSS.MS-ESS1-4

What is the largest division of time?

• Era

• Period

• Eon

• Epoch

Tags

NGSS.MS-ESS1-4

Eras are major subdivisions based on differences in what?

• Climate

• Life forms

• Rock types

• Ocean levels

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

Periods are based on types of what?

• Climate changes

• Life existing at the time and geologic events

• Rock formations

• Ocean currents

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

NGSS.MS-ESS2-3

How do periods differ from other periods?

• By the length of time

• By differences in plant and animal life

• By the number of days

• By the amount of rainfall

Periods are further divided into epochs which are significant changes in what?

• Climate patterns

• Rock layers, such as mineral composition and the appearance of distinctive fossils

• Ocean levels

• Atmospheric pressure

Tags

NGSS.MS-ESS1-4

When did the Precambrian Era begin?

• 3.5 billion years ago

• 4.6 billion years ago

• 2.5 billion years ago

• 1.5 billion years ago

Tags

NGSS.MS-ESS1-4

What type of life forms were there during the Precambrian Era?

• Dinosaurs and mammals

• Birds and reptiles

• Cyanobacteria and invertebrates

• Amphibians and fish

Tags

NGSS.MS-LS4-1

What is special about the timeline of the Precambrian Era?

• It was the shortest era

• It was the longest era

• It was the most recent era

• It was the era with the most fossils

Tags

NGSS.MS-ESS1-4