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4.5 billion years ago the Earth was an unformed doughnut of molten rock and it was called the synestia.
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4.4 billion years ago meteors kept crashing into the Earth causing more extreme temperatures. Also, water started to form.
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4 billion years ago, rain and thunder started to come down. As it rained the Earth started to become a water world.
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3.4 billion years ago the Earth was green with green oceans. This carried bad gases in the oceans that can be deadly to this day.
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2.4 billion years ago the first continents were finally made and also the production of oxygen has formed on Earth. It took a billion years to make the water blue but its not blue its just the refraction.
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The first continent on Earth. It was called Rodinia and it was a supercontinent. Later was separated by meteors and volcanic activity.
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700 million years ago the Earth was a giant ice ball. The polar region was frozen and almost killed every species and made them extinct.
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Temperatures were below -40 degrees Fahrenheit. The Rondonia opened up and created shallow oceans. It was broken up by volcanoes and cause the ice to break.
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Most major groups of species lived in the ocean. They were the first to appear in the fossil record and it was a relatively short time period over diversity of forms that appeared.
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This time period started a major extinction to most species. The extinction lasted 44.6 mill years which many know that many species came to an end.
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The Silurian period was the shortest time period of the Paleozoic Era. It spanded 24.6 million years.
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Spanning 60 million years there is a city called Devon, England where rocks from this period of time were first studied.
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Spans 60 million years. This time period reflects the facts that many coal beds were formed globally during that time. Also famous for swamp forests.
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Spans 47 million years. It was the last period of the Paleozoic period. It holds the largest mass extinction in Earth's history. 96% of marine species and 70% of terrestrial species died out.
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Lasted about 50.6 million years. A globally warm world that was containing relatively high sea levels and was dominated by reptiles to a world polar glaciation.
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Spanned 56 million years. Had dinosaurs ruling the Earth as some were meat eaters and others were plant eaters. Many killed each other for food. It is also known as age of the reptiles.
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200 million years ago the dinosaurs walked the Earth. Two foot dragonflies were flying around and a new continent called Pangea was made.
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It was the last of the three periods of the Mesozoic Era and it ended 66 million years ago to this day. It followed the Jurassic Period as the Earth was still ruled by dinosaurs. It ended with a mass extinction.
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Spanned about 66 million years. As reptiles still walked the Earth the land was widely used to live in for the reptiles. Sea levels were high at this period of time.
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Encompasses the most recent 2.6 million years and includes the present day. It had dramatic climate changes that affected food resources and brought mass extinctions to many species.
