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Dinosaurs: Back from the Grave

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1 Dinosaurs: Back from the Grave
Stephanie Baumgart

2 Rock Cycle 3 types of rock: Igneous Sedimentary Metamorphic
volcanic rock Sedimentary compacted rock Metamorphic deformed, changing rock Igneous – volcanic origins Sedimentary – compacted rock Metamorphic – deformed, changing rock

3 Journey to the Center of the Earth
Just over 4000 miles to the center of the earth: Crust 5-25 miles thick Mantle 1800 miles thick Solid rock – hotter rock moves towards the surface, cooler rock sinks towards the core Outer Core 1400 miles thick Liquid iron, flows around Generates magnetic field Inner Core 800 miles thick Solid iron, very hot (4700o C)

4 Plate Tectonics – The Land Moves!
The ground you’re sitting on is moving about 1.15 cm per year Pangea supercontinent 300 million years ago Land masses join and split and join again Next supercontinent in 250 million years

5 Fossilization: How do you become a fossil?
Go die in the water – a calm riverbend or out in the deep sea are your best options Eventually, your soft tissue will deteriorate and you will be buried by sediment as the water flows by As time goes by, the sediment will solidify and turn to rock, minerals in the sediment will turn your bones into rocks, more layers will cover you over the course of millions of years The earth shifts, uncovers a couple of your bones, and someone may find you

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7 Ornithischia Thyreophorans Armored dinosaurs
Ex: Ankylosaurus, Stegosaurus Bird-hipped dinosaurs Herbivores (Plant-eaters) Spend most of their time on four legs; when they run, they can run on two legs Ornithopods Bird-like dinosaurs Ex: Iguanodon, Pachycephalosaurus Marginocephalians Frilled dinosaurs Ex: Protoceratops, Triceratops

8 Saurischia Lizard-hipped dinosaurs Sauropods Long-necked dinosaurs
Largest animals to roam the earth Four-legged Ex: Apatosaurus, Brachiosaurus Theropods Mostly carnivores Two-legged A branch of theropods evolved into birds Ex: Tyrannosaurus, Velociraptor


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