Le classi terze Montessori presentano.... a.s. 2009/10 febbraio 2010 WHAT IS A DINOSAUR? When the dinosaurs lived, the Earth's continents were jammed together into a supercontinent called Pangaea and the Earth was warmer than it is now.
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Millions of years ago, long before there were no people, there were dinosaurs. Dinosaurs were one of several kinds of prehistoric reptiles that lived during the Mesozoic Era, the "Age of Reptiles."
(like Argentinosaurus, Seismosaurus, Ultrasauros, Brachiosaurus, and Supersaurus).
The smallest dinosaurs, like Compsognathus, were about the size of a chicken. Most dinosaurs were in-between.
Butblue whales are more massive than any of the dinosaurs were!
It is very difficult to figure out how the dinosaurs sounded, how they behaved, how they mated, what color they were, or even how to tell whether a fossil was male or female
(also called herbivores).
Triceratops was a
(also called carnivores).
For example, T. rex was a meat-eating dinosaur.
some had horns, crests, spikes,or frills
and some even had primitive feathers.
There are a lot of theories why the extinction occurred. The most widely accepted theory is that an asteroid impact caused major climactic changes to which the dinosaurs couldn't adapt.
on today as the birds.
All that's left of the
dinosaurs are fossils
and, perhaps,the birds.
been found all over the
world, maybe even
near where you live!