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Tyrannosaurus Rex

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Erin Markel

on 10 November 2012

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Transcript of Tyrannosaurus Rex

Tyrannosaurus Rex Physical Characteristics They were 40-50 ft. long and up to 20 ft. tall. Their massive heads were about 5 ft. long They had a huge set of
jaws, emitting almost
4 tonnes of force per
square inch They were the predator, and the top of the dinosaur food chain T-rexes
were scavengers,
and carnivores Food Easy prey was the idea of a T-rex's dinner . . . they often feasted on the young, old, and sick -they also saw more gentle herbivores as accessible prey. Their great sense of sight and smell made them excellent hunters Their eyes were positioned
in front of the skull, making
their line of vision very prominent Their arms were stubby compared to the rest of their body . . . only 2-3 ft. long . . . but could still hold hundreds of pounds They had long and strong legs.
At nearly 15 ft. a stride,
they could run at 25 mph. T-rexes walked on their two hind legs, since it would not be possible for them to use their arms for transport. The beasts probably weighed 8 tonnes when fully matured. Their teeth were 6" cones, and very jagged They ate about
970 kg of
meat a week. They had a short muscular neck to hold up their massive head The Extinction Theory Tyrannosaurus Rexes went extinct by the beginning of the Tertiary period Why? Scientists think . . . An asteroid hurtled
Earth It did not burn up It started to pass through Earth's atmosphere It hit Earth somewhere in present- day Mexico Tonnes of noxious fumes and dust covered Earth for years, killing almost everything The T-rex lived in the late Cretaceous period, along with other dinosaurs such as the ankylosaurus and triceratops. The Era The T-Rex has only been found in a few places across the globe: the USA, Mongolia, and Canada Sue Fossils Found in South Dakota Found in Mongolia Footprint Found in Montana The T-Rex lived near herbivores, so you would often find them near areas rich in vegetation,
such as forests, woodland, rivers, and valleys The Tyrannosaurus Rex went extinct along with the rest of its fellow reptilian dinosaurs. The T-rex became fossilized when an asteroid hit Earth, and the tonnes of dust that covered the world preserved the bones fast enough that they remained in fair condition over millions of years. These are common places where dinosaurs once roamed. Complete fossils are not very common since they were very large animals, but it seems they lived in normal places. . . probably because they needed meat to survive. Roots Roar!!! -Erin Markel A large portion of their brain was dedicated to smell. Ecosystem
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