Precambrian Era

Many fossils from this time are trace fossils.

• Precambrian Time

• Paleozoic Era

Which type of life dominates the Precambrian Time?

• Dinosaurs

• Mammals

• Bacteria

• Humans

Paleontologists, geologists, and other scientists organize important events and species in the correct time zone. What type of record is used to help with this?

• The Fossil Record

• The Diary

• The Constitution

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

The closest organism that we have today to the first invertebrates are horseshoe crabs. What group of organisms are known as the first invertebrates to live on earth?

• Trilobites

• Stromatolites

• Invertebrates

The Geologic Time Scale is a record of what?

• old geologists

• sweet geology music

• the known history of rocks and fossils

• a list of every living thing ever

Tags

NGSS.MS-ESS1-4

which were the first organisms to inhabit land environment

• amphibians

• reptiles

• plants

• invertebrates

The time span that lasted the longest was the...

• Precambrian Time

• Paleozoic Era

• Mesozoic Era

• Cenozoic Era

Tags

NGSS.MS-ESS1-4

90% of Earth’s history occurred during which division of time?

• Precambrian

• Paleozoic

• Mesozoic

• Cenozoic

Tags

NGSS.MS-ESS1-4

Where did oxygen in Earth's atmosphere come from originally?

• from plants

• from cyanobacteria

• from rocks

• from animals

What is the Precambrian Era known for in terms of geological activity?

• Formation of the first continents

• Dominance of dinosaurs

• First appearance of mammals

• Mass extinction events