Geological Time Scale

What division of time was the longest ?

• Paleozoic

• Mesozoic

• Cenozoic

• Precambrian

Tags

NGSS.MS-ESS1-4

When did Precambrian time end

• 542 million years ago

• 4.5 Billion years ago

• 3.65 Billion years ago

• 3.8 Billion years

Tags

NGSS.MS-ESS1-4

what are eras mark all that apply

• Proterozoic

• Mesozoic

• Precambrian

• Hadean

• Paleozoic

Tags

NGSS.MS-ESS1-4

What era did dinosaurs go extinct ?

• Paleozoic

• Mesozoic

• Cenozoic

Tags

NGSS.MS-LS4-1

What is the geological time scale ?

• A clock

• A calendar

• Something that divides Earths history into groups

Tags

NGSS.MS-ESS1-4

Fossils

• The preserved evidence in rocks or soils of organisms that were once alive

• A scientist who studies prehistoric life

• When a part of the organism is changed into another mineral

• Circular rocky structures thought to be the earliest evidence of living organisms called the cyanobacteria

Tags

NGSS.MS-LS4-1

Palaeontology

• The preserved evidence in rocks or soils of organisms that were once alive

• The time period on the geological time scale when complex life forms were developing

• A scientist who studies prehistoric life

• The study of prehistoric life

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

Absolute dating

• A way of determining the actual age of rocks and fossils

• Finding a relative age for two bones from the same area by comparing the amount of fluorine in them

• Comparing strata in different locations to determine their relative ages

• Fossil that can be used to compare the relative age of rock strata in different locations

Half-life

• different forms of the same element with different numbers of neutrons

• a way of determining the actual age of rocks and fossils

• the time it takes for half of a radioactive sample to decay

• layers of sedimentary rock

Tags

NGSS.HS-PS1-8

Index fossil

• fossil that can be used to compare the relative age of rock strata in different locations

• the preserved evidence in rocks or soils of organisms that were once alive

• comparing strata in different locations to determine their relative ages

• fossil that can be used to compare the absolute age of rock strata in the same location

Tags

NGSS.MS-ESS1-4