Can You Tell a
Brachiosaurus
from an
Apatosaurus?
Buffy Silverman
To Emma, one
of my favorite
plant eaters
Copyright 2014 by Lerner Publishing Group, Inc.
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Library of Congress Cataloging-in-Publication Data
Silverman, Buffy.
Can you tell a Brachiosaurus from an Apatosaurus? / by Buffy Silverman.
p. cm. (Lightning Bolt BooksDinosaur Look-Alikes)
Includes index.
ISBN 978-1-4677-1360-3 (lib. bdg. : alk. paper)
ISBN 978-1-4677-1755-7 (eBook)
1. BrachiosaurusJuvenile literature. 2. ApatosaurusJuvenile literature. 3. Dinosaurs
Juvenile literature. I. Title.
QE862.S3S483 2014
567.913dc23
2012046438
Manufactured in the United States of America
1 PP 7/15/13
Table of Contents
Dino
Diagrams
Legs : Front
and Back
Dinosaurs lived on Earth
millions of years before
people. The largest dinosaurs
belonged to a group called
sauropods.
Sauropods towered
over other dinosaurs.
Sauropods had
long tails and
long necks. Their
heads looked tiny.
Sauropods walked on land.
They were huge and heavy.
They needed strong legs
to get around.
A sauropods strong legs
supported its big body.
Brachiosaurus and
Apatosaurus were both
sauropods. They looked a lot
alike. They both had long
necks and long tails. But
you can tell these
dinosaurs apart.
Which sauropod is
a Brachiosaurus,
and which is an
Apatosaurus?
Look at the front legs of
this Brachiosaurus. These
legs were longer than the
back legs.
The upper bone of a Brachiosaurus
front leg was feet (2.2 meters)
long. Thats taller than most
grown men!
Apatosaurus had
giant legs too. But
its front legs were
shorter than its
back legs.
Reaching
for Plants
Brachiosaurus and Apatosaurus
ate hundreds of pounds of
plants each day.
Imagine eating as much as
a sauropod. Youd need
to munch hundreds of
heads of lettuce a day!
Brachiosaurus and
Apatosaurus needed a
lot of energy to move
their heavy bodies.
They saved energy
by staying in one
place. They moved
their long necks to
find food.
Brachiosaurus could reach
higher than Apatosaurus. It
held its neck upward. It ate
plants that grew up high.
Giraffes use their long
necks and tall front
legs to reach leaves.
So did Brachiosaurus.
Brachiosaurus
grabbed tree
ferns and other
tall plants. Its
tall front legs
helped it reach
high places.
Scientists think Apatosaurus held
its neck closer to the ground.
It ate low- growing plants. It
probably found ferns along
rivers. It might have searched
lakes for water plants.
Brachiosaurus had twelve
bones inside its long neck.
The bones were hollow
but strong.
Each neck bone was
about as long as a
childs baseball bat.
Apatosaurus had fifteen bones
inside its neck. Its bones were
hollow too. The bones were
half as long as Brachiosaurus
neck bones.
You have seven bones in
your neck. The bones
are much smaller than
Apatosaurus neck bones!
Teeth
Tales
Dinosaur teeth came
in different shapes.
The shape
shows us what
and how a
dinosaur ate.
This is a tooth from
Rebbachisaurus,
another sauropod
that ate plants.
Apatosaurus had long, peg-
shaped teeth. Its teeth could
strip soft leaves off plants.
Brachiosaurus could
stuff its mouth
full of plants.
Brachiosaurus teeth were
shaped like spoons. Spoon-
shaped teeth let it grab lots of
tough leaves.