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CARMALT - 4 Eras of Earth's existance

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Question
Answer
4.5 billion years agoliving things were one-celled organisms   Precambrian Era  
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600 million years agofossile recrods of hard-shell animals   Cambrian Period (Paleozoic Era)  
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510 million years agoanimal life in the oceans   Ordovician Period (Paleozoic Era)  
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439 million years agofirst land plants evolve, reefs build up   Silurian Period (Paleozoic Era)  
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408 million years agoland plants and amphibians evolve   Devonian Period (Paleozoic Era)  
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360 million years agoamphibians and reptiles evolve   Carboniferous Period (Paleozoic Era)  
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290 million years agocone-bearing plants and reptiles evolve   Permian Period (Paleozoic Era)  
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245 million years agomammals present   Triassic Period (Mesozoic Era)  
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208 million years agodinosaurs present   Jurassic Period (Mesozoic Era)  
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144 million years agomore different dinosaurs appear than during Jurassic Period   Cretaceous Period (Mesozoic Era)  
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65 million years agoapes and humanoids   Tertiary Period (Cenozoic Era)  
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1.6 million years ago to TODAY!humans   Quaternary Period (Cenozoic Era)  
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