Earth science rock, soil and fossils jack horner dinosaur hunter

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JACK HORNER

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Number of Words: 264 PHOTOGRAPHY CREDITS Cover © AP Wide World Photos

1 © Louie Psihoyos/Science Faction Images 2 © Louie Psihoyos/ Science Faction Images 3 © Richard T Nowitz/Photri 4 © Ken Lucas/Visuals Unlimited 5 © Sinclair Stammers/Photo Researchers, Inc 6 © David R Frazier/Photo Researchers, Inc 7 © Tom McHugh Photo Researchers, Inc 8 © Louie Psihoyos/Science Faction Images

Copyright © by Houghton Mifflin Company All rights reserved

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URGK 19) RNER,

DINOSAURIUNTER:

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Jack Horner is a paleontologist (PAY lee ahn TAHL uh gihst) A paleontologist is a

scientist who studies fossils Fossils show what plants and animals from long ago looked like Jack studies dinosaur fossils Dinosaur fossils

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Jack learns many important things about dinosaurs from studying their fossils Fossils

show how and where dinosaurs lived long ago

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Jack thought the bones were from a

dinosaur called a duck-billed dinosaur But the

bones were different from other duck-billed

bones Jack knew they had found a new kind

of duck-billed dinosaur He called it Maiasaura

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Jack also found fossils of Maiasaura eggs at Egg Mountain The eggs were found close together in a rocky nest Jack thinks that the eggs in the nest show that these dinosaurs cared

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team of dinosaur hunters discovered the largest Besides the Maiasaura fossils, Jack and his

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Some scientists think that 7 rev was a

dinosaur that chased other animals for food

Jack thinks that T rex may have eaten only dead

animals The fossils show that T? rev may not

have been able to chase after other dinosaurs

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dinosaurs Studying dinosaur fossils helps him Jack has learned many things about

learn how they lived long ago Jack likes finding

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Responding

Think About What You Have Read

What does a paleontologist study?

Bi What has Jack Horner discovered about duck-billed dinosaurs?

What does Jack think about T: rex? Why do

you think he has this idea? Hint: Look at the

pictures on pages 7 and 8 to help you answer this question

Activity

Pretend you are a dinosaur hunter You just found a new kind of dinosaur fossil Write a letter to a

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Earth Science: Rocks, Soils, and Fossils