Prehistoric Beasts

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Dinosaurs

• Prehistoric Beasts
• from our past

Kelli A. Plumeri Grade 2 EDU6302
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FossilsWe learn about dinosaurs from their
fossils. Weve all heard of fossils and know a
little about them. But what do we really know?

• Fossils are the ancient remains of plants and
  animals.
• Some plant and animals remains are preserved by
  nature. They petrify to become fossils.
• Dinosaur fossils have been found all over the
  world.
• Scientists can measure the age of most fossils
  through a process called radiocarbon dating.

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Fossil Facts Continued

• Animal fossils are often teeth, bones, or
  shells. Rarely, whole bodies of animals may be
  preserved. Why do you think this is?

• Dinosaur remains are millions of years old.
• Do you remember the name of the process that
  tells scientists how old fossils are?

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Dinosaur Diets
There were three types of diets for dinosaurs.
These are

• Carnivore Dinosaurs who were carnivores ate
  meat only.
• Herbivore Dinosaurs who were herbivores ate
  plants only.
• Omnivore Dinosaurs who were omnivores ate both
  plants and meat.
• What are you?

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I WANT TO KNOW ABOUT DINOSAURS!!!

• How many kinds were there?
• Scientists have found more than 300 kinds of
  dinosaur fossils. It is likely that there are
  more dinosaurs awaiting discovery.
• Where in the world are they from?
• They have been found all over the world on
  all of our 7 continents. In our country, USA,
  they have been found in many of our 50 states.
• Do you know the names of all 7 continents?
• Click HERE to find out!
• To learn more about dinosaur fossils and where
  they were found, click on the following link
• http//www.zoomdinosaurs.com

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We will be looking at four dinosaurs and learning
more about them. Take a look at this chart to see
what we will study
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T-Rex
The Tyrannosaurus Rex, or T-Rex, is probably the
most popular and vicious of all prehistoric
animals

• Height 18 feet
• Weight 7 tons
• Length 40 feet
• Diet carnivore
• Top running speed about 20 mph

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T-Rex Fun Facts

• The T-Rex jaws were 3 feet around. Each of its
  60 teeth were shaped like daggers and were 6
  inches long.
• The T-Rex had giant muscular legs and small front
  arms.
• How do you think it caught prey?

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Learn about T-Rex fossil discoveries
at http//www.fieldmuseum.org/
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Brachiosaurus

Brachiosaurus is one of the biggest dinosaurs
ever found. They roamed the Earth over 130
million years ago!
Height about 40 feet Weight 80 100 tons
(this is more than 20 elephants!) Length
70-90 feet Diet - herbivore
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Brachiosaurus Fun Facts

• Brachiosaurus means arm lizard
• The first Brachiosaurus was discovered over 100
  years ago in Colorado.
• It could have looked over the top of a
  three-story building.
• Some scientists believe it lived in the water,
  using its long neck to keep its head above the
  surface.

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Use this diagram to see how big the
Brachiosaurus really was!
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Triceratops
Along with the T-Rex, Triceratops is probably
one of the most famous dinosaurs ever found.

• Weight 6 tons
• Length 30 feet
• Diet omnivore
• Fossils found USA and Canada

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Triceratops The Three-Horned Beast
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Triceratops Fun Facts

• The triceratops has three horns on its head. The
  two main horns on the forehead area are each more
  than 3 feet long!
• The horns were used for wrestling and charging
  the enemy.
• The frill is the part of the head that expands
  out beyond the neck and back. The head and frill
  together were more than 6 feet long!

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Stegosaurus
The Stegosaurus had bony plates down its
back. Some scientists believe these were used for
protection from flesh-eating dinosaurs.
Weight 2 tons Length 30 feet Diet
omnivore Fossils found USA, Europe, Africa,
India, and China
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Stegosaurus Fun Facts

• Stegosaurus was first discovered in 1877 in
  Colorado.
• Stegosaurus means plated lizard.
• It had a small tube-like head, small teeth, and
  the brain the size of a walnut.
• Check out more Stegosaurus facts on the following
  link
• http//www.stegosaurus.org/

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Comparing the Beasts

• We have learned about four famous dinosaurs.
• These are
• Tyrannosaurus Rex,
• Brachiosaurus,
• Triceratops, and
• Stegosaurus
• But when did they exist?
• Lets look at the following page
• to compare them

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Exactly how old are dinosaurs?Lets compare them
to other animals we know
Examine a Geologic Time chart HERE
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What happened to the Dinosaurs?

• There are many different ideas that scientists
  have about how the dinosaurs became extinct.
  Some scientists believe the dinosaurs caught an
  infectious disease. Some say the volcanoes
  erupted all over the world. We dont really know
  for sure.
• Check this link to find out other theories on
  extinction.
• But what does extinct mean?
• Extinct Animal breeds that have completely died
  out. They do not exist anymore.
• Endangered Animal breeds that there are very
  low numbers of. They are in danger of dying out
  completely.

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What other animals are extinct or endangered?
Some examples are

• Extinct
• Caribbean monk Seal
• Dodo Bird
• Heath Hen
• Dire Wolf
• Stag-moose
• American Mastodon
• Mammoths

• Endangered
• Puma
• Jaguar
• Hawaiian monk Seal
• Blue Whale
• Humpback Whale
• Brown Pelican
• American Crocodile

Learn more about endangered and extinct animals
at http//www.kids.msn.com/kidz/endangeredspecies
.asp
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What did you learn?Use a blank sheet to answer
the following questions

• 1. Which dinosaur is larger
• Brachiosaurus or Triceratops?
• 2. Carnivores eat ________ only.
• 3. Which dinosaur had a brain the size of a
  walnut?
• 4. T-Rexs teeth were _____ inches long.
• 5. If an animal species no longer exists, it is
  ___________.

Click HERE for Answers
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Great Work!!!

• You have learned about many dinosaur breeds and
  fun facts. Use the following links to continue
  your discoveries

Dinosaur Dig-Kids Habitat http//www.sdnhm.org/ki
ds/dinosaur/ Childrens Stomping
Ground http//www.oink.demon.co.uk/topics/dinosaur
.htm
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Resources
http//www.oink.demon.co.uk/topics/dinosaur.htm
http//www.zoomdinosaurs.com
http//www.stegosaurus.org
http//www.ucmp.berkeley.edu/trex/trexpo.htm/
http//www.kids.msn.com/kidz/endangeredspecies.asp
http//www.sdnhm.org/kids/dinosaur/
Lambert, D. (1983). A Field Guide to Dinosaurs.
Avon Books. New York, New York
Hincks, J. (1990). The Rourke Dinosaur
Dictionary. Rourke Enterprises, Inc.
Russell, W. (1994). Fossils. The Rourke
Corporation, Inc.
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The End

• You are official dino discoverers!

Kelli Plumeri EDU6302