Today for Science, we did a history on the prehistoric life for dinosaurs. The three period of time are Cretaceous, Jurassic and Triassic. Cretaceous is a period from 65 million years ago to 144 million years ago. Jurassic is a period of time from 144 million years ago to 208 million years ago. Triassic is a period of time from 208 million years ago to 248 million years ago. We looked at a time line of when creatures were here before dinosaurs. Birds, small reptiles and mammals were alive 65 million years ago to 144 million years ago. Which was a VERY long time ago. Dinosaurs were here 144 million years ago to 208 million years ago. Triassic reptiles, amphibians and ammonites were here 208 million years ago and disappeared 248 million years ago. Here is my activity.
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