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BBC Before the Dinosaurs - Walking With Monsters
Water Dwellers Worksheet

The first segment of the Walking With Monsters series covers the Cambrian period up through the Silurian period and the Devonian period. The majority of animal life during this age was restricted to the ocean, although there were a few species that began moving onto land for food and into freshwater sources within the continents for a safe haven from predators. A species called Haikouichthys, called the first vertebrate, is featured, along with huge arthropods like Brontoscorpio.

Key Concepts: Cambrian period, Cambrian explosion, Silurian period, Devonian period, vertebrates, arthropods, giant impact hypothesis, amphibians.

Answer Key: Available at the biology instructor resources subscription page.



 

 

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