kiran dinosourus

8/6/2019 kiran dinosourus

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1) Allosaurus, who was previously known as Antrodemus, was one of a large genus (group)of dinosaur, who's remains have been found as far a field as America, Africa and the

Australian Continent.

Allosaurus weighed about 2 tonnes (2,000kg) and could grow up to 12 metres (40ft) in length. he

had a long tail, like a lot of other dinosaurs, for balance.

Allosaurus, a biped, had very strong hind limbs and a massive pelvis with strong anteriorly andposteriorly directed projections. The forelimbs, much smaller than the hind limbs and probably

used for grasping, had three fingers ending in sharp claws. The skull was very large in relation to

the compact body and was lightened by the presence of several large openings. The powerfuljaws had large pointed teeth and were very flexible, allowing the animal to take large bites out of

its prey. It is likely that Allosaurus preyed upon the medium-sized dinosaurs, especially the

ornithopod forms and their relatives. It is possible that Allosaurus was also a scavenger, feedingupon carcasses of dead or dying animals. It may have hunted in groups.

2) Apatosaurus (formerly Brontosaurus) was a herbivore, which means he ate plants of

various types, but no meat. He was from the Late Jurassic Period and lived in America

and Europe (when the two were joined together). He weighed over 30 tonnes (30,000kg),which makes him one of the largest dinosaurs, or in fact, all creatures ever to have lived

on land. The Apatosaurus, From nose to tail could reach 20 metres in length.


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His legs were like tree trunks, holding up his large body. His movement would be slow, due to

his size. He could go into water, such as a lake to bathe and drink, but mainly lived on land. He

roamed around and ate plants, mainly luscious leaves from tall trees, as a giraffe does today. Helived from 163 million yrs ago, right up to 143 million years ago, as far as we know.


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3) Archaeopteryx is the oldest known Bird, and is from the Late Jurassic Period. He

fluttered around between 144 and 163 million years ago. The fossil of this ancient

creature was found in mud deposits in a lake, in Bavaria.

It was about the size of a medium to large chicken, but unlike a chicken, it had well formed

wings, so it could fly. However, it probably wasn't a very graceful flyer, and may have looked alittle silly. Unlike most modern birds (though not all), the Archaeopteryx had teeth. He had a

long tail and his feet had 3 claws on them (making them very bird like indeed).

4) Brachiosaur was a member of a genus (group) of dinosaurs called Brachiosourus. He

lived 163 to 144 million years ago in Africa America and Europe. Brachiosaurs had verylong necks and a fully grown adult could easily be 25-30 meters (75-100ft) in length,

from nose to tail. He could stand up to 15 metres high and weigh 80-100 tonnes (80-

100,000kg)

Scientists used to believe that Brachiosaur spent a lot of time in water, but this isactually impossible because the pressure of deep water would probably have killed


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these dinosaurs. It is generally accepted nowadays, that they wandered aroundeating leaves from tall trees, a lot like giraffe's do today.

5)Triceratopses (plural of Triceratops) was from a group of herbivorous dinosaurs called the

ceratopsians, who all had 3 horns. They lived in the Late Cretaceous Period of from 66.4 to 97.5

million years ago.

Triceratops was one of the last dinosaurs on Earth. By the time of his extinction, most others had

already died out. He had survived the Tyrannosaurus and all other predators for millions of

years, but whatever killed off most of the other dinosaurs, also finished him off eventually.

He was probably much like a modern day Rhinoceros today, in many ways. He would have spentmost of his day grazing on low plants, and would gather in small herds, for safety (as cows do

today). However, if approached (like a Rhinoceros) he would probably become very vicious

indeed, and may well have put up a good fight against Tyrannosaurus when cornered.

He could grow up to 8 metres (25 ft) long and had a long skull with a bony frill around his neck,for protection against bites. Triceratops had 3 long horns, one on his nose, and the 2 longest ones

(each more than 1m or 3ft long) above his eyes. His head alone was more than 2 metres (6ft)

long, and from nose to tail, he could easily reach 9 metres (30ft). He was BIG, butTyrannosaurus Rex was even bigger.

His huge, thick boned body made him a little slow, but his huge strength also made him

fearsome, if he needed to be. his legs were short and thick, but very strong. His mouth was very

much like a beak at the front, excellent for biting off chunks of plant. But in his cheeks he alsohad flat or rounded teeth, good for chewing plants properly before he swallowed.
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Tyrannosaurus was the largest carnivore of the whole cretaceous period,and was undoubtedly

feared by most other dinosaurs at the time.

An adult Tyrannosaurus measured more than 14 metres from nose to tail. His huge skull alonewas nearly 1.3-1.5 metres in length. He walked on 2 legs, which made him a 'bipod', and was as

over 6 metres tall (about as high as a house).

Weighing about 8 tonnes (8,000kg - as much as 4 large cars) he was a fearsome sight to anyeyes. To make him even more frightening, his sharp, pointed teeth were about 15cm long, with

serrated edges (jaggedy, a little like a shark's teeth), so that they could easily tear through thick

skin and flesh.

His arms were short in comparison to the rest of him, but they were very strong, and were

equipped with no fingers, but 2 rounded claws, which may well have been used to grab hold ofhis victims, to stop them from running away. Once the claws had the prey grasped for a second

or 2, the Tyrannosaurus could bite with his huge mouth and teeth, and dinner would be served.

Because his head was so large, and because tyrannosaurs normally stooped forward (especiallywhen eating), his large and heavy tail was a necessity. It prevented him from falling over. He

could have been able to use it as a weapon to hit other creatures, but probably not, since the end

with the head on it was even more dangerous.
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Since the bones of Tyrannosaurus are normally found near to the bones of ceratopsians (horned

dinosaurs, such as Triceratops), it is presumed that these creatures were the Tyrannosaur's

normal food. A Tyrannosaurus wouldn't be found behind every bush. In fact, there was only 1 inevery 100 square miles (about 260 sq km).

Stegosaurus was a common plant-eating dinosaur in western North America during the

LateJurassic Period. It had small, simple teeth, and probably fed on vegetation close to the

ground.

Stegosaurus also had weak jaw muscles, implying that it could not chew its food veryeffectively. It may have required a method similar to the one used by sauropods such as

Diplodocus and Apatosaurus. These dinosaurs ripped away huge amounts of plant matter which

they barely chewed before swallowing. The food would then ferment in the stomach, ground upby small rocks which the dinosaurs swallowed just for that purpose.

Tall bony plates on its back and paired spikes on its tail give Stegosaurus a very distinctive

appearance. The spiked tail was almost certainly used for defense against large predators likeAllosaurus. In addition to protecting the dinosaur's back, the bony plates were full of channelsfor blood vessels, and probably also conducted heat to and from the animal's body.
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