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DlnoSdurS
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M@d @b@Mt"qq
03:
DlnoSdurS
This looolc belongs to:
I F
A cotologue record for this book is ovqiloble from the British Librory Published by Lodybird Books Ltd BO Strond London WC2R ORL A Penguin Compony
46810975 O LADYBIRD BOOKS LTD MMVIII IADYBIRD ond the device of o Lodybird ore trodemorks of Lodybird Books Produced by Colcium for Lodybird Books
ISBN:
Ltd
Ltd
9281 84646 922 0 Printed in Chinq
It
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Whclt were dinosclurs? Dinosqurs were reptiles thqt first wolked on Eorth between 203 ond 225 million yeors ogo, during o time colled the Mesozoic erq. Then suddenly, 65 million yeors ogo, they oll died out. Fossils of dinosour bones show us how they moy hqve looked. There were mony different kinds of dinosour. Some were peoceful. Others, such qs Deinonychus, were fierce hunters.
Plqnt-eoting Stegosourus hqd two rows of bony plotes thot ron olong its bock ond toil.
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Apotosourus wos o giont, slow-moving plont-eoter.
If you have o computer, you con downloqd o poster of different dinosours from www. I odyb ird.
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Time of the dinosours The Mesozouc ero wos divided into three periods: the Tricrssic, Jurcrssic ond Cretqceotls. Eoch period hod o different climcrte ond its own type \ of plonts. Dinosours olso chonged from one period to onother.
Mqny leofy plonts grew In the Jurossic period. Thot meqnt there wos plenty of food for plont-eoting dinosours, ond they grew bigger qnd bigger.
Archoeoptery one of the eorliest of birds. It hod feothered wings ond o feothered toil.
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Brochiosourus
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Other creotures shqred the dinosour world. Some, cqlled pterosqurs, flew in the skies.
TRIASSIC
JURASSIC
200-250
L45-200
million yeors ogo
million yeors crgo
CRETACEOUS 65-r45 million yeors ogo some creqtures, such os
Ichthyosourus, swctm in the seos
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DinoSo ur bodieS Lorge meot-
dinosours hqd similqr skeletons. These included o skull spine, ribs, hips, shoulders, legs, ond toil. Dinosours hcrd different body shopes, depending on how they lived.
A11
eoters, like
Albertosourus, hod huge skulls to corry the
weight of their tooth-filled jaws.
Meqt-eqters' teeth were different to plont-eqters' teeth. Meot-eqters hqd shorp teeth for gripping qnd teoring flesh. Plont-eqters hqd flotter or rounder teeth for grinding up plonts.
Diplodocus wos o plont-eoter 1
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sottor'urus
The first dinosqurs wolked on two legs. As dinosours become lo.rger, some of them wqlked on four legs to hold up their lorge stomochs. t)|
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Allosoul'tts wcls o meot-eoter
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Weird ond wonderful Dinosours come in mony shopes orrd sLzes. Some of them looked very stronge!
Corythosourus had o
brightly coloured heod crest. It moy hove used its crest to ottrqct q mote.
Oviroptor's beok like o bird's.
wq.s
just
Tricerotops hod three lorge horns on its foce. Tricerotops herds mqy hove grouped together to moke on outword-fqcing circle. Their bobies would hove been sofe inside the circle.
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Spinosourus hod o bony soil olong its bock. Blood vessels inside the soil moy hqve wqrmed up in the sltlr. Thcrt would hove kept this dinosour worm.
Huge
pldnt-edters Tricerotops'heod
Some of the lqrgest dinosours were plont-eqters. They hod to eot huge omounts of food to stlrvive. The plonts they qte were tough ond
tn
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thqt's the height of a fully-grown mon!
difficult to digest. Cetioscrurus wcrs cur enormous dinosqur. It wos 16 metres long. When it wos first discovered, scientists thought Cetiosqurus wos
Some lorge plont-eoting dinosqurs
q whole becouse
swqllowed stones to help breok down the food inside their stomqchs.
it wqs so big! Sperm whole
Brqchiosqurus hod o very long neck. It wos held up by incredibly strong muscles. Brochiosourus
Diplodocus hod on extremely long bock snd toil. It wqs os long qs two buses. Its four, pillor-like legs helped to keep it upright.
wcrs os
toll trs cr
four-storey
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15
frrledt-edters Meot-eqting dinosqurs usuolly hqd long, strong legs. They used them to run quickly, so they could cqtch their prey. They qlso hod strong jows, shorp teeth ond deqdly clows. Allosourus could open its jows for oport ond move
them outwords to eqt huge chunks of flesh.
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eosily cotch
its prey.
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Tyronnosourus rex used its forword-focing eyes to see exoctly how fff owoy its prey wos before it ottocked.
Tyronnosourus rex's shorp teeth were qbout 18 centimetres long.
Deinonychus used its rozor-shorp, swivelling toe clqws to slosh into the flesh of dinosqurs. By hunting in pocks, Deinonychus could bring down dinosours much bigger thon itself.
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Defence Mony plqttt-eqting dinosours hod horns or spikes, which they used to defend themselves. Others simPlY used their enormous Srze to Score owoy enemies. Edmontonio hod shorP shorp spikes
spikes olong eoch side of its body. Tough, bony ridges on its bock gove
it more
protection.
Euoplocepholus hqd o lorge qt the end of club Tyronnosourus
l.r,rr ffi
rex
itS tOiI.
It
coUld
bring down qn qttqcker just by giving it oshorp top on the shin.
Sgme dinosqurs could reor up
ontd'their two bqck legs to moke themselves bigger.
II
Living together Some dinosours lived together. Plont-eoters often lived in lorge groups, or herds. Some meot-eoters lived in smoll groups, or pocks. A few dinosours moy hqve even
communicctted with
sound with its qir-filled crest. The sound moy hove worned other dinosqurs thqt on enemy wos neqr.
o-rms of dinosour
eoch other.
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ffi
Porqsqurolophus could moke o trumpeting
protecting eggs
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ossili zed nests show us thqt boby dinosours stoyed in their nests F
eggs
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