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Big Bang
The Big Bang is the early development of the universe. The Big Bang occured 13.75 billion years ago. -
Period: to
Geologic Time Scale
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Precambrian Era
During the Precambrian, some of the most important events in history took place. They were, tectonic plates were formed and began to move, atmosphere became enrich in oxygen, and the first complex multicellelur organisms were formed. -
Quaternary
The Quaternary Period is the most recent of the three periods of the Cenozoic Era in the geologic time scale.The 2.6 million years of the Quaternary represents the time during which recognizable humans existed. -
Paleozoic
During the Paleozoic era, one of the most important events was the evolution of sea animals becoming land animals. Also the formation of the super continent of Pangea.http://www.youtube.com/watch?v=MZGzMwoEguU -
Cambrian
This is the time when most of the major groups of animals first appear in the fossil record.Almost every metazoan phylum with hard parts, and many that lack hard parts, made its first appearance in the Cambrian. -
Ordovician
During this period, the area north of the tropics was almost entirely ocean, and most of the world's land was collected into the southern supercontinent Gondwana.Ordovician strata are characterized by numerous and diverse trilobites and conodonts (phosphatic fossils with a tooth-like appearance) found in sequences of shale, limestone, dolostone, and sandstone. -
Silurian
This was a time when the Earth underwent considerable changes that had important repercussions for the environment and life within it.In the oceans, there was a widespread radiation of crinoids, a continued proliferation and expansion of the brachiopods, and the oldest known fossils of coral reefs. -
Devonian
The vegetation of the early Devonian consisted primarily of small plants, the tallest being only a meter tall.The Devonian seas were dominated by brachiopods, such as the spiriferids, and by tabulate and rugose corals, which built large reefs in shallow waters. -
Carboniferous
Land animals formed from water animals like amphibians. Forests and swamps covered most of the land. -
Permian
The distinction between the Paleozoic and the Mesozoic is made at the end of the Permian in recognition of the largest mass extinction recorded in the history of life on Earth.The global geography of the Permian included massive areas of land and water. -
Pensylvanian
The Pennsylvanian is, in the ICS geologic timescale, the younger of two subperiods (or upper of two subsystems) of the Carboniferous Period.All modern classes of fungi were present in the Pennsylvanian. -
Mississippian
The Mississippian time period lasted from 360 to 325 million years ago, a time span of 35 million years.The Mississippian is a subperiod in the geologic timescale or a subsystem of the geologic record -
Mesezoic
http://teachertube.com/viewVideo.php?video_id=142694Dinosaurs started to appear on land and sea. Also small mammals started to appear.
http://teachertube.com/viewVideo.php?video_id=142694 -
Triassic
At this time that the world-continent of Pangaea existed, altering global climate and ocean circulation. -
Jurassic
The dinosaurs are the dominant life form on earth. The supercontinent Pangea had begun rifting into two landmasses. -
Cretaceous
The end of the Cretaceous brought the end of many previously successful and diverse groups of organisms, such as non-avian dinosaurs and ammonites.At about the same time, many modern groups of insects were beginning to diversify, and we find the oldest known ants and butterflies. -
Cenozoic
Age of mammals appear and primates also appear. The world started to get cooler and dryer in the air. -
Pleistocene
Woolly mammoths, rhinos, and humans appear.The Pleistocene also saw the evolution and expansion of humans. -
Tertiary
The Tertiary period begins with the catastrophe that killed off the dinosaurs, about 65 million years ago.As the continents continued to drift apart, plate tectonics caused a lot of volcanoes.
