Earth History Crossword

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QUESTIONS LIST: Devonian: Numerous fishes, other sea life; many plants, first trees; wingless insects, Paleozoic: Oldest era; organisms developed hard parts, Evolution: The process of change that produces new life forms over time, Stone Age: Prehistoric period during which stone was widely used, Era: A major division of geologic time, Archean: Formation of oceans, atmosphere, and continents; bacteria, Permian: Largest extinction in Earth's history, Jurassic: many sea reptiles;early large dinosaurs; later,flying reptiles, and earliest known birds, Cenozoic: relating or denoting to the most recent era, Cretaceous: period characterized by the greatest development, rise of modern insects and flowering plants, Reptile: a cold-blooded vertebrate including snakes and lizards, Precambrian: All the geologic time before the start of the Cambrian Period in the Paleozoic Era., Eon: Period in Earth's history, Geology: science of the history of the earth as recorded in rocks, Ordovician: Diverse marine life, including vertebrates; vascular plants, Mesozoic: Era comprising of the Triassic, Jurassic, and Cretaceous periods, Dinosaur: an extinct terrestrial reptile of the Mesozoic era, Periods: subdivisions of eras