Worksheets and No Prep Teaching Resources
Worksheets and No Prep Teaching Resources
Reading Comprehension Worksheets
The Mystery of Tyrannosaurus Rex's Short Arms



The Mystery of Tyrannosaurus Rex's Short Arms
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A Short Reader

Reading Level
     edHelper's suggested reading level:   grades 3 to 5
     Flesch-Kincaid grade level:   3.21

Vocabulary
     challenging words:    evolve, fearsome, opening, theropod, theropods, tyrannosaurus, eaters, solution, grip, carnivorous, sharks, longer, between, however, mystery, weapon
     content words:    Heh RARE


The Mystery of Tyrannosaurus Rex's Short Arms
By Cindy Grigg
  

1     Tyrannosaurus rex was a fearsome dinosaur. It weighed between six and ten tons. It had huge jawbones. Its mouth opening was three feet across! T. rex was a theropod dinosaur. Theropods were two-legged meat eaters. T. rex was one of the last, and biggest, of the theropods.
 
2     The early theropod dinosaurs like Herrerasaurus (Heh-RARE-ah-SAW-rus) had longer arms with as many as five fingers. However, T. rex had very small, short arms. It had only two fingers on each hand. Its short arms couldn't even reach its mouth. With only two claws, it couldn't grip its prey. Why did the theropods evolve with shorter arms and fewer claws?

Paragraphs 3 to 4:
For the complete story with questions: click here for printable



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