(See related pages)
Section 7.1, page 231, Question 21
Geological Periods
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| Outline of Historical Evolution | ||
| This timeline of geological periods also shows the life forms that developed in each period. ( http://www.mun.ca/biology/scarr/Geological_Eras_Periods_&_Epochs.htm ) | ||
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| The Time of the Dinosaurs | ||
| Dinosaurs lived on Earth for about 165 million years during the Triassic, Jurassic, and Cretaceous periods. These three periods combined are called the Mesozoic, or the Age of Dinosaurs. Find out more here. ( http://www.enchantedlearning.com/subjects/dinosaurs/mesozoic/ ) | ||
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| Table of Geological Periods | ||
| The geological history of Earth since the Cambrian Period is subdivided into three eras, each of which includes a number of periods. The periods are subdivided into epochs and stage ages. Sound confusing? The information on this site will help you sort it all out. ( http://www.factmonster.com/ipka/A0001822.html ) | ||
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