Earth Time Flashcards
1
Q
Earth age
A
4.6 bya
2
Q
Biggest division of time
A
Eon*
3
Q
Earliest rocks
A
3.8 bya Precambrian
4
Q
Cambrian explosion
A
Started Paleozoic period
5
Q
Earliest plants
A
Silurian
6
Q
Bony fish
Earliest amphibians and ammonites
A
Devonian
7
Q
Permian extinction
A
245-45 mya
8
Q
Dinosaurs extinct
A
85 Mya
9
Q
First prokaryote cell
A
3.5 bya
10
Q
Explosions and extinctions
A
Explosions- life developers
Extinction- life dies
11
Q
Earlier fish
A
Ordovician
12
Q
Earliest terrestrial Animals
A
Silurian
13
Q
Earliest dinosaurs
A
Triassic
14
Q
Dinosaurs flourish
A
Jurassic
15
Q
Dinosaur extinction
A
Cretaceous
