THE PALEOZOIC ERA By: Andrés Fajardo, Mauricio Buendía, Álvaro Vivas, and Juanita González.

The Paleozoic Era was the first geological age of the Phanerozoic Eon. It began about 570 million years ago and ended about 230 million years ago. It was characterized by having massive extinctions and marine habitats.

There were 6 main periods Those Were: Cambrian period Ordivician period Silurain period Davonian period Carboniferus period Permian period.

Cambrian Period An « explosion of life » ocurred Multi cellular organisms Organisms developed hard body parts: Shells and body skeletons Marine habitats were created

Ordovician Period Marine habitats continued evolving Great diversity of animals:  A lot of invertebrates  vertebrates began their evolution

Silurian period millions years ago. Creation of Tropical habitats occurred 1st fish with true jaws appeared

First multi cellular plants evolved First animals living on land appeared:

Devonian period Million Years ago  Vertebrates and invertebrates on the sea  Fishes: with jaws bony skeletons and scales  Plants appeared on dry areas

First amphibians appeared Insects evolved on the land « 1st insects »

Carboniferous Period Million years ago. A Lot of habitats developed Amphibians, insects and land plants adapted more Vertebrates Insects Insects Plants

1st Reptiles evolved from Amphibians Mountain building created habitats by the way…..

Permian period million years ago Invertebrates and vertebrates expanded +++++….. Reptiles ancestors Modern reptiles mammals dinosaurs

Finally………………….. Ended 230 millionyears ago It was a massive extinction % of ocean species became extinct. The shells or coverings of the animals of this era made them fofossilize much more easily.

BIBLIOGRAPHY Book: biology miller and levine Grade 9 biology book Images internet (sorry we dont have the links)