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4 terms

General Science: Dinosaurs and other ancient life

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dinosaur
one of the great variety of extinct reptiles that lived 245 million to 65 million years ago
extinction
The permanent disappearence of a species.
sauropod
very large herbivorous dinosaur of the Jurassic and Cretaceous having a small head a long neck and tail and five-toed limbs
theropod
member of an ancient group of dinosaurs that walked on two feet