Dinosaur Overview and Mesozoic Era
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Questions and Answers

What does the word 'dinosaur' mean?

Terrible lizard

How long did dinosaurs roam the earth?

More than 150 million years

Dinosaurs lived in which era?

Mesozoic era

What does 'Mesozoic' mean?

<p>Middle life</p> Signup and view all the answers

What are the three periods of the Mesozoic era?

<p>Triassic, Jurassic, Cretaceous</p> Signup and view all the answers

What type of class were dinosaurs?

<p>Reptiles</p> Signup and view all the answers

What was the time range of the Mesozoic era?

<p>251 mya to 65 mya (186 my)</p> Signup and view all the answers

What was the time range of the Triassic period?

<p>252.17 mya to 201.3 mya (51.04 my)</p> Signup and view all the answers

What period came before the Triassic?

<p>Permian period</p> Signup and view all the answers

What period came after the Triassic?

<p>Jurassic period</p> Signup and view all the answers

What is the time range of the Jurassic period?

<p>201.3 mya to 145.5 mya (55.8 my)</p> Signup and view all the answers

What is the Jurassic period known as?

<p>The Age of Reptiles</p> Signup and view all the answers

What came before the Jurassic period?

<p>Triassic period</p> Signup and view all the answers

What came after the Jurassic period?

<p>Cretaceous period</p> Signup and view all the answers

What was the longest period of the Mesozoic era?

<p>Cretaceous period</p> Signup and view all the answers

What is the time range of the Cretaceous period?

<p>145.5 mya to 65.5 mya</p> Signup and view all the answers

Cretaceous-Paleogene Extinction (K-Pg) is also known as?

<p>The K-T Extinction (Cretaceous Tertiary)</p> Signup and view all the answers

What ended the Mesozoic Era?

<p>KT Extinction</p> Signup and view all the answers

How long was the Mesozoic Era?

<p>186 my</p> Signup and view all the answers

What extinction happened before the Mesozoic Era?

<p>P/Tr extinction</p> Signup and view all the answers

What are the two main types of dinosaurs?

<p>Ornithischian and Saurischia</p> Signup and view all the answers

What does 'Ornithischia' mean?

<p>'Bird-hipped'</p> Signup and view all the answers

What does 'Saurischia' mean?

<p>'Lizard-hipped'</p> Signup and view all the answers

Which way does the pubic bone point in Saurischians?

<p>Points forward towards the front of the animal</p> Signup and view all the answers

Which way does the pubic bone point in Ornithischians?

<p>Points towards the back (the tail) of the animal</p> Signup and view all the answers

What does 'theropod' mean?

<p>Beast foot</p> Signup and view all the answers

What are the characteristics of theropods?

<p>Meat eaters, 2 powerful legs they walk on, short arms</p> Signup and view all the answers

Give an example of a theropod.

<p>Tyrannosaurus Rex</p> Signup and view all the answers

What are the characteristics of sauropods?

<p>Long necks, long tails, walks with four pillar-like legs, small heads relative to size of body</p> Signup and view all the answers

Give an example of a sauropod.

<p>Brachiosaurus</p> Signup and view all the answers

What are the characteristics of Thyreophora?

<p>Walks with four legs, had bony plates or spikes</p> Signup and view all the answers

Give an example of Thyreophora.

<p>Stegosaurs</p> Signup and view all the answers

Theropods are a part of which higher classification?

<p>Saurischia</p> Signup and view all the answers

Sauropods are a part of which higher classification?

<p>Saurischia</p> Signup and view all the answers

Thyreophora are a part of which higher classification?

<p>Ornithischia</p> Signup and view all the answers

Cerapods are a part of which higher classification?

<p>Ornithischia</p> Signup and view all the answers

What are the characteristics of cerapods?

<p>Can walk and run, do not fit into the three other categories</p> Signup and view all the answers

Give an example of a cerapod.

<p>Iguanodon</p> Signup and view all the answers

Birds evolved from which classification of dinosaur?

<p>Theropods (Saurischia)</p> Signup and view all the answers

What is a dromeasaur?

<p>Family of feathered theropods, small to medium-sized carnivores</p> Signup and view all the answers

Give examples of dromeasaur.

<p>Velociraptor, Utahraptor, Deinonychus</p> Signup and view all the answers

Study Notes

Dinosaur Overview

  • The word "dinosaur" translates to "terrible lizard."
  • Dinosaurs roamed the Earth for over 150 million years during the Mesozoic Era.

Mesozoic Era

  • The Mesozoic Era is known as the "Middle Life," spanning from 251 million years ago (mya) to 65 mya.
  • It consists of three periods: Triassic, Jurassic, and Cretaceous.

Triassic Period

  • Lasted from 252.17 mya to 201.3 mya (approximately 51.04 million years).
  • Preceded by the Permian period.

Jurassic Period

  • Spanned from 201.3 mya to 145.5 mya (about 55.8 million years).
  • Known as the "Age of Reptiles," following the Triassic period.

Cretaceous Period

  • The longest period of the Mesozoic Era, lasting from 145.5 mya to 65.5 mya.
  • Ended with the Cretaceous-Paleogene extinction (K-Pg), also known as the K-T Extinction.

Extinctions

  • The KT Extinction marked the end of the Mesozoic Era.
  • Prior to the Mesozoic Era, the Permian/Triassic (P/Tr) extinction occurred.

Dinosaur Classifications

  • Dinosaurs are classified as reptiles and fall into two main groups: Ornithischian (bird-hipped) and Saurischian (lizard-hipped).
  • In Saurischians, the pubic bone points forward; in Ornithischians, it points towards the back.

Theropods

  • Theropods, meaning "beast foot," are characterized by being meat-eaters with two powerful legs and short arms.
  • An example of a theropod is Tyrannosaurus Rex.

Sauropods

  • Known for long necks, long tails, and four pillar-like legs with small heads comparatively.
  • An example of a sauropod is Brachiosaurus.

Thyreophora

  • Walk on four legs and possess bony plates or spikes; an example is Stegosaurs.

Higher Classifications

  • Theropods and sauropods belong to Saurischia.
  • Thyreophora and Cerapods comprise Ornithischia.

Cerapods

  • Cerapods can walk and run and do not fit into the other three categories; an example is Iguanodon.

Evolution of Birds

  • Birds evolved from theropods, a classification of Saurischia.

Dromeasaur

  • Dromeasaurs are a family of feathered theropods, typically small to medium-sized carnivores.
  • Notable examples include Velociraptor, Utahraptor, and Deinonychus.

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Description

Explore the fascinating world of dinosaurs and the Mesozoic Era in this quiz. Learn about the different periods such as the Triassic, Jurassic, and Cretaceous, as well as significant extinctions that shaped the history of life on Earth. Test your knowledge of these ancient creatures and their environment.

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