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Why Did the Dinosaurs Die Out? Dinosaurs

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Why Did the Dinosaurs Die Out?
Print Why Did the Dinosaurs Die Out? Reading Comprehension


Reading Level

	edHelper's suggested reading level:	grades 7 to 8
	Flesch-Kincaid grade level:	7.16

Vocabulary

	challenging words:		supercontinent, ecologists, paleontologists, radiation, supernova, dating, extinction, gathering, violent, geologists, theory, atmosphere, shortage, evidence, interesting, affected
	content words:		North America, Alvarez Hypothesis, Cretaceous Period

Other Languages
     Spanish: ¿Por qué se extinguieron los dinosaurios?

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Why Did the Dinosaurs Die Out? By Sharon Fabian

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¹     Why did all of the remaining dinosaurs die out suddenly at the end of the Cretaceous period? There is a short answer and a long answer to this question.
 
²     Here is the short answer. No one knows for sure.
 
³     Here is the long answer. There are a number of theories. Some are scientific, and some are ridiculous. Most scientists believe in one or two main ones, but no one knows for sure.
 
⁴     The reason no one knows for sure is because the whole thing happened about 65 million years ago. No one was around to see or hear what was going on back then, and no one was around to keep records.

Paragraphs 5 to 14:
For the complete story with questions: click here for printable

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Dinosaurs

Dinosaurs

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