Segement One: What is a dinosaur?
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Curriculum links

Science in the New Zealand Curriculum: Making Sense of Planet Earth and Beyond
Students can

Level 2
2
understand that Earth is very old and that animals and plants in past times were very different

 

Level 4
2 collect and use evidence from landforms, rocks, fossils, and library research to describe the geological history of the local area

 

Level 5
1/2 investigate and describe processes which change the Earth’s surface over time at local and global levels

Science in the New Zealand Curriculum: Making Sense of the Living World
Students can

 
Level 1
1 share their experiences relating to the living world, and group the living world according to some of its attributes
 
Level 2
1 use differences and similarities in external characteristics to distinguish broad groups of living things
 
Level 3
1 distinguish between living things within broad groups on the basis of differences established by investigating external characteristics
 
Level 4
1 investigate and classify closely related living things on the basis of easily observable features
 

Background information

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A dinosaur was a form of reptile that first appeared more than 225 million years ago during the Mesozoic Era. While all dinosaurs were reptiles, most reptiles are not dinosaurs.

This segment shows students the two features that allow us to classify what is and what isn’t a dinosaur. Often people are under the misapprehension that if a creature lived at the time of the dinosaurs then it was a dinosaur. Prehistoric marine reptiles (eg, plesiosaur) and flying reptiles (eg, pterodactyl) are popularly thought of as dinosaurs, but they were not.

In this segment two identifying biological features of a dinosaur (diapsid skull and legs below the body) are explained.

A key feature of a dinosaur was that it had legs beneath its body. Many reptiles, such as lizards and frogs, have legs that protrude from the sides of their bodies, while others, such as snakes, have no legs at all. Having legs under their body was a huge advantage for dinosaurs – they could move far more efficiently than many other creatures.

 

Diapsid skull

Another key feature of a dinosaur was its diapsid skull. A diapsid skull has two openings – behind and above the eye sockets – on each side. By comparison, mammals, including humans, have synapsid skulls – with a single opening on each side. If an animal has its legs beneath its body and a diapsid skull, then it can be called a dinosaur.

Remember that although the dinosaurs were dominant at this time, other reptiles, mammals, fishes, and insects coexisted with them.


Profiles

(Click on the image to find out more.)

Pliosaur
Psittacosaurus sinensis


Suggested activities and discussions for this segment

  • Have your students read the labels and study the skeletons. Then get your students to choose which of the four skeletons is a dinosaur. At each skeleton discuss with them the two rules for deciding if it is a dinosaur – legs straight underneath and a diapsid skull. For example, the tuatara (skeleton) has a diapsid skull but its legs stick out of the sides of its body.
  • Ask your students how they think human beings walk. Do they walk with their legs underneath or out to the side? Compare this with how the dinosaurs walked.
  • Get your students to study the skulls on display and feel their own skull. Have them work out whether they have the same extra holes as a dinosaur and tuatara (diapsid) – which would be a hole behind the eyes near the top of the skull.


Suggested classroom activities

  • Collect various pictures of dinosaurs, prehistoric marine and flying reptiles, modern reptiles and some prehistoric mammals (eg, mammoth, sabre-toothed tiger, etc). Get the children to classify them into groups before visiting Dinosaurs from China and then again after the class visit. Each time ask the students to explain their reasonings behind how they chose to group the animals – see if this has changed after the visit.
  • Get your students to investigate differences in walking. Have them walk normally with legs beneath the body, and then again on all fours with their arms and legs out to the sides like a lizard (a press-up pose). Discuss the pros and cons of each, such as ease and speed of walking and running, energy used, etc.
  • Brainstorm and list as many different sorts of dinosaurs as the class can. As everyone learns more about dinosaurs and just how many different kinds there were, their ‘profiles’ can be added to the list.
SUGGESTED READING AND WEBSITES
  • Could a Tyrannosaurus Play Table Tennis?
    Plant, Andrew. 2002 The Penguin Group, Australia.
    A fun ABC-of-dinosaurs picture book, with some information about the dinosaur on the bottom of the page. The author’s introduction useful too.
  • Dinosaur New Zealand
    Cox, Geoffrey and Wiffen, Joan. 2002 HarperCollins Publishers, New Zealand.
    Good basic information on reptiles and dinosaurs of New Zealand.
  • Dinosaurs – The Ultimate Guide to Prehistoric Life
    Brochu, Christopher A. et al. 2000 HarperCollins Publishers, London.
    A great all-round guide to dinosaurs. It has information about fossils, fossil hunters, what is a dinosaur, etc.
  • Hot topics: Dinosaurs
    Cooper, John. 2003 Zigzag Children’s Books, London.
    Another good question-and-answer book. It includes an easy-to-understand diagram on how scientists group dinosaurs and the difference between reptile and dinosaur leg structure. There is also a page of suggested websites to visit.
  • The Illustrated Encyclopedia of Dinosaurs
    Norman, Dr David. 1985 Salamander Books Ltd, London.
    A good detailed book on all aspects of the dinosaurs (and other creatures).
  • I Wonder Why: Triceratops Had Horns and Other Questions About Dinosaurs
    Theodorou, Rod.1994 Kingfisher Publications Plc, London.
    A children’s picture book that answers the questions that people often ask about dinosaurs.
  • The Kingfisher Illustrated Dinosaur Encyclopedia
    Burnie, David. 2001 Kingfisher Publications Plc, London.
    This encyclopedia covers more than just dinosaurs and is an excellent reference book for all the segments featured in this exhibition.
  • The Really Deadly and Dangerous Dinosaur
    Taylor, Barbara. 1997 Dorling Kindersley Ltd, London.
    This is a book to read with your students. It has good photographs of fossils and models, with great descriptions to accompany them
  • http://news.bbc.co.uk/1/hi/sci/tech/default.stm
    This is the BBC news website. In the top right corner is an internal search engine for their database. If you type in dinosaurs you get lists of the latest news on dinosaur finds and research from around the world.

Books displaying this icon are available for purchasing at Te Papa store.