KEY:
Taskl: Task 2:
Precambrian		j    single-cell organisms in the ocean (jelly ! fish)
Cambrian i		trilobites, explosion of animals animals with shells _________.,_______.....________ j
Ordovician		mollusks, corals algae
Silurian		plants on land, algae, fishes and scorpions in the oceans
Devonian i		fishes (shark), first amphibians and j insects on the land j
Carboniferous		giant fauna, gigant ferns, insects, first ; reptiles (
Permian               [ 03,: a*]		reptiles over the land, diverse forms j
Triassic              l£~bmX 'xsi'kj    j    ageof reptiles, earliest dinosaurs [		
Jurassic	[ctiCu* rac^llc ]  |    flying reptiles (pterodactylus)	
Cretaceous		flowering plants, many new dinosaurs, j tyrannosaurus; at the end of this period 1 dinos died out
Tertiary		mammals dominated the land, became { very diversified such as first known horse
Quaternary	1 i	large mammals (such as quiptodont or j i mammoth) died out, modern humans - j appeared 100,000 years ago