The History Of Dinosaurs

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Term Paper Title	The History Of Dinosaurs
# of Words	1960
# of Pages (250 words per page double spaced)	7.84

The History of Dinosaurs

The dinosaurs were reptiles that appeared about 230 million years ago. It's believed that they
had scaly skin and some ate plants and others ate meat. Scientists don't know whether or not the
dinosaurs were cold blooded, but they think the smaller ones were warm blooded, and the large
ones were cold-blooded. In this report you'll learn about the earliest dinosaurs, the kinds of
dinosaurs, and how the dinosaurs died.

There are two main groups of the earliest dinosaurs: Thesaurischian, and the ornithischian
First I'll tell you about the Saurischian. The Saurischian were the first main group of dinosaurs.
The Saurischian had lizard like hip joints. In this group there is the Theropoda. These weird
dinosaurs were meat eaters that walked on their hind legs. Also there was the Sauropoda. The
Sauropoda were the plant eating dinosaurs that walked on all four legs.

The second main kind of dinosaurs were the Ornithischian, which had bird like hip joints. There
is only one group belonging to this group and that is the ornithopoda. The Ornithopoda were
plant-eating dinosaurs that walked on two legs. There were also the armored and horned
dinosaurs, which were also plant eaters.

There were many, many different kinds of dinosaurs. Some of them are the Brachiosaurus, the
Stegosaurus, the Triceratops, the Tyrannosaurus, and the Zizhongosaurus.
All of the dinosaurs are in one of two major groups. Plant eaters or meat eaters. Some plant
eaters are the Saltasaurus, the Kritosaurus, and the Datousaurus. Some Meat eaters are the
Chilantaisaurus, the Poekilopleuron, and probably the most terrifying one of all, the
Tyrannosaurus.

During the Carboniferous Period (360 to 286 million years ago), dense tropical forests were concentrated along the equator. Decaying vegetation, compressed by overlying deposits of sand and mud, was gradually converted into coal. Coal deposits of Illinios, the Appalachians, Britain and Germany were originally formed in a continuous band which was dispersed when the continents drifted apart.

The Mesozoic Era lasted from 245 until 65 million years ago. In the sea, marine communities began to assume a modern composition of molluscs and other invertebrates. On land, dinosaurs dominated faunas, and the first flowering plants appeared. At the beginning of the Mesozoic, all of the earth's continents were joined as the supercontinent Pangea.

Some dinosaurs can swim and some can fly. The ones that swim have large, ...

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