Show:
Time Scale
Epochs & Eras
Vocabulary
Reptiles, Mammals, Living Organisms
Pot Luck
100
Eras are subdivided into...
What is periods
100
Modern humans evolved during the...
What is pleistocene epoch
100
Many boundaries in the geologic time scale are marked by the occurrence of...
What is mass extinction
100
Marine Mesozoic reptiles included...
What is pleiosaurs
100
This can form when plants are buried in an oxygen-poor environment...
What is coal swamp
200
The longest time unit in the geologic time scale...
What is eon
200
You live in the...
What is holocene epoch
200
Form in the interiors of continents when glaciers melt...
What is inland seas
200
This was a Mesozoic reptile that could fly...
What is pterosaur
200

This event produced the Appalachian Mountains...

What is collisions of continents

300
Many divisions in the geologic time scale are based on...
What is sudden changes in the fossil record
300
The first era of the Phanerazoic eon...
What is Paleozoic era
300
Gouges made by ice sheets are...
What is glacial grooves
300
The first organisms to inhabit land environments...
What is plants
300
The Precambrian time lasted approximately...
What is 4 billion years
400
The smallest unit of geologic time...
What is epoch
400
The correct order of eras, from oldest to youngest..
What is Paleozoic, Mesozoic, Cenozoic
400
This might form when continents move close together...
What is a land bridge
400
This made dinosaurs different from modern-day reptiles..
What is hip structure
400

How old is the Earth?


4.6 billion years old

500

How many eras are there in Earth's history?


Three

500
The era known as the age of invertebrates...
What is Early Paleozoic
500
This might occur if an environment changes suddenly...
What is a mass extinction
500
This is considered at mega-mammal
What is woolly mammoth
500

What periods do humans live in today?

Quaternary