dinosaurs dinosaurs are reptiles that lived millions of years ago. dinosaur means terrible lizard
TRANSCRIPT
Dinosaurs
• Dinosaurs are reptiles that lived millions of years ago.
• Dinosaur means terrible lizard.
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?
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
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
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
What did dinosaurs eat?
• Carnivores are meat eaters.
• Herbivores are plant eaters.
• Omnivores are both plant and meat eaters.
Dinosaur informationWhen did they live?
Compsognathus
Dimetrodon
Triceratops
Ankylosaurus Velociraptor
Deinonychus
Oviraptor
Tyrannosaurus
Stegosaurus
Dinosaurs
Flying reptiles
Click on a dinosaur’s
name
What did dinosaurs eat?
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.
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.
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.
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”.
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.
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.
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.
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.
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.
Pteranodon Pterodactylus
Pterosaurs
Flying reptiles
Reptiles of the seaDinosaurs
Click on a reptile’s
name
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.
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.
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.
Plesiosaurus
Elasmosaurus
Reptiles of the sea
Click on a reptile’s name
Dinosaur fossilsFlying reptiles
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.
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.
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
Why did dinosaurs become extinct?There are several theories:
Theory 5
Theory 4 Theory 3
Theory 2
Theory 1
?
Dinosaur activitiesDinosaur fossils
Theory 1
• An earthquake shook the earth and killed all the dinosaurs.
Theory 2
• The carnivores ate all the herbivores and then died because they had nothing left to eat.
Theory 3
• A meteor struck the earth and blocked out the suns rays. Everything became very cold and frozen.
Theory 4
• All volcanoes exploded at the same time and killed all the dinosaurs in the lava flow.
Theory 5
• Egg eating dinosaurs ate all of the eggs.
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I hope that you have enjoyed the dinosaur show.
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