Dinosaurs Dinosaurs are reptiles that lived millions of years ago. Dinosaur means terrible lizard.
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Transcript of Dinosaurs Dinosaurs are reptiles that lived millions of years ago. Dinosaur means terrible lizard.
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Dinosaurs
• Dinosaurs are reptiles that lived millions of years ago.
• Dinosaur means terrible lizard.
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When did dinosaurs live?
Triassic Period192 to 225 million
years ago
Jurassic Period135 to 192 million
years ago
Cretaceous Period65 to 135 million
years ago
What did Dinosaurs eat?
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Life in Triassic Times
• The climate was very dry and warm.
• The land was low-lying with plains, deserts, swamps and forests.
• Dinosaurs appeared for the first time.
• Some dinosaurs that lived in the Triassic period are:
• Coelophysis• Dimetrodon• Plateosaurus• Massospondylus• Teratosaurus
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Life in Jurassic Times
• Large areas of the earth were covered by oceans during this time.
• The climate was cool and moist but it gradually became warmer and drier.
• Dinosaurs that lived in the Jurassic period are:
• Diplodocus• Stegosaurus• Apatosaurus• Allosaurus• Brachiosaurus• Archaeopteryx
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Life in Cretaceous times
• The seas grew larger, then dried up at the end of the period.
• Lots of flowering plants appeared.
• Mountain ranges were formed.
• Dinosaurs that lived in the cretaceous period are:
• Ankylosaurus• Triceratops• Pteranodon• Gallimimus• Tyrannosaurus• Iguanodon
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What did dinosaurs eat?
• Carnivores are meat eaters.
• Herbivores are plant eaters.
• Omnivores are both plant and meat eaters.
Dinosaur informationWhen did they live?
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Compsognathus
Dimetrodon
Triceratops
Ankylosaurus Velociraptor
Deinonychus
Oviraptor
Tyrannosaurus
Stegosaurus
Dinosaurs
Flying reptiles
Click on a dinosaur’s
name
What did dinosaurs eat?
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Dimetrodon
• Dimetrodon was not a dinosaur, but a Pelycosaur.
• It walked on four legs and was a meat eater.
• The sail was believed to have acted as a solar heater then later in the day as a cooler.
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Compsognathus
• Compsognathus may have been warm-blooded.
• It had scales covering its body that became the first true feathers.
• They could run quickly through the undergrowth.
• Compsognathus ate plants, small reptiles and mammals.
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Oviraptor
• Oviraptor means “egg thief”.
• Oviraptor was an omnivore.
• It had a parrot like head with strong jaws that could crush hard objects.
• It lived in the Cretaceous period.
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Stegosaurus
• The bony plates on its back protected it from attacks by meat eaters.
• Two pairs of powerful spikes at the end of the dinosaurs tail were used as a weapon.
• Stegosaurus had teeth in the back of its mouth used for chewing plants.
• One of the strongest dinosaurs and was nicknamed “cover lizard”.
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Triceratops
• Name means “three-horned face”.
• It was a plant eater that ripped up plants with its turtle like beak.
• Three horns on its head protected the Triceratops from meat-eating dinosaurs.
• It probably charged at its enemies like a rhinoceros does.
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Tyrannosaurus
• Name means “tyrant lizard”.
• Lived in the late cretaceous period.
• It grew 12 metres high.
• Its teeth were up to 18 cm long.
• Its hands had only two fingers.
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Ankylosaurus
• Ankylosaurus was the most fully armoured reptile of all time.
• Its teeth, used for chewing plants, were all in the back of its jaw.
• It had a big, bony club at the end of its tail to fight off enemies.
• It was a peaceful, slow moving dinosaur.
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Deinonychus
• Deinonychus was a meat eater.
• It has razor sharp claws on its rear feet that it used as vicious weapons.
• Its small front legs were adapted for grasping and holding.
• It walked only on two toes on each foot.
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Velociraptor
• Lived during the cretaceous period.
• Its name means “rapid robber”.
• Veliciraptor was a carnivore and had knife-sharp teeth.
• It could jump up to 4 metres to reach its prey.
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Pteranodon Pterodactylus
Pterosaurs
Flying reptiles
Reptiles of the seaDinosaurs
Click on a reptile’s
name
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Pteranodon
• Pteranodon was the largest flying creature of all time.
• It flew above the oceans, swooping to catch sea creatures in its powerful beak.
• Pteranodon had a huge bony crest on the back of its skull.
• It had a huge, toothless beak.
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Pterosaur
• Name means “winged lizard”.
• Ate fish and it had a 7 metre wingspan.
• Lived during the Triassic and Cretaceous periods.
• Pterosaurs could glide but could not fly.
• It weighed less than 17 kg.
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Pterodactylus
• Pterodactylus was not a dinosaur. It was a flying reptile.
• It name means “winged fingers”.
• Pterodactylus was very light with hollow bones.
• It had a large brain and good eyesight.
• It lived on lakeshores.
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Plesiosaurus
Elasmosaurus
Reptiles of the sea
Click on a reptile’s name
Dinosaur fossilsFlying reptiles
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Elasmosaurus
• Elasmosaurus was a sea creature.
• It looked like a turtle with a very long neck and tail.
• They could swim, but not dive because they couldn’t lift their flippers high enough.
• They used their broad, flat flippers as oars.
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Plesiosaurus
• Plesiosaurus means “almost a lizard”.
• It lived in the Cretaceous period.
• Plesiosaurus is related to dinosaurs.
• It used its four paddle-like limbs for swimming.
• It grew 12 metres long.
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Dinosaur FossilsHow do we know that dinosaurs
ever existed?
• A fossil - part of a dead plant or animal that has been buried and turned as hard as stone by chemicals in the rock.
Dinosaur theoriesReptiles of the sea
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Why did dinosaurs become extinct?There are several theories:
Theory 5
Theory 4 Theory 3
Theory 2
Theory 1
?
Dinosaur activitiesDinosaur fossils
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Theory 1
• An earthquake shook the earth and killed all the dinosaurs.
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Theory 2
• The carnivores ate all the herbivores and then died because they had nothing left to eat.
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Theory 3
• A meteor struck the earth and blocked out the suns rays. Everything became very cold and frozen.
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Theory 4
• All volcanoes exploded at the same time and killed all the dinosaurs in the lava flow.
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Theory 5
• Egg eating dinosaurs ate all of the eggs.
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Click this button for extra dinosaur activities
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I hope that you have enjoyed the dinosaur show.
Keep learningabout these wonderful creatures.