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LEP CH 13

Chapter 13 Study Guide

QuestionAnswer
What is the currently accepted age of the Earth? 4.6 billion years old
What three eras followed the Precambrian Era? Paleozoic, Mesozoic, Cenozoic
In order, list the largest to shortest divisions of geologic time. Eons, Eras, Periods, Epochs
What happened to the continents at the end of the Paleozoic Era? They fused together to form Pangaea.
The remains or traces of prehistoric life are called. Fossils
What were the three periods that make up the Mesozoic Era? Triassic, Jurassic, Cretaceous
The dominant plants of the Mesozoic were the __________ Gymnosperms
Which reptiles related to Mesozoic reptiles survive today? turtles, snakes, crocodiles, lizards
What is believed to cause the great extinction at the end of the Mesozoic Era? A Meteorite struck Earth
The Cenozoic Era is divided into what two periods? Tertiary and Quarternary
The dominant plants during the Cenozoic were ___________ Angiosperms
The Cenozoic is known as the age of ____________ Mammals
What animals dominated the Mesozoic Era? Reptiles
During which era did the supercontinent Pangaea begin to breakup? Mesozoic
Great worldwide changes in forms of _____ on Earth mark the boundaries of eras? Life
The Tertiary Period lasted about _____ million years 63
In the early Paleozoic, life was restricted to the _____ Sea
Created by: ptavarone
 

 



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