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Illustrations JanetMoneymaker MarjieBassler Copyright2014GravitasPublications,Inc. Allrightsreserved.Nopartofthispublicationmaybereproduced,storedinaretrieval system,ortransmitted,inanyformorbyanymea

Contents iii CONTENTS CHAPTER 1 WHAT IS GEOLOGY 1. 1 1.2 1.3 1.4 1.5 Introduction History of Geology Modern Geology Everyday Geology Summary 2 3 4 6 7 9 10 11 12 13 15 17 23 24 1 CHAPTER 2 HAMMERS

iv Contents CHAPTER 6 THE AIR WE BREATHE 6.1 6.2 6.3 6.4 6.5 Introduction The Atmosphere What Is Air Why Doesnt Air Float Away Summary 45 45 46 49 51 53 54 55 56 58 59 59 61 63 64 67 67 68 70 70 72 73

2 Focus On Elementary Geology 1.1 Introduction Do you ever pick up rocks and wonder how they were made and what they are made of Do you sometimes look at mountains and wonder how they were formed Ha

Chapter 1 What Is Geology 3 1.2 History of Geology Depending on where you live, when you go outside and walk around, youll see many different features of Earth. You might see mountains or rivers. Yo

4 Focus On Elementary Geology Theophrastus was a student of Aristotle who was another famous Greek philosopher. Like Aristotle, Theophrastus was interested in science. He studied rocks and explored

Chapter 1 What Is Geology 5 Some modern geologists focus on the chemistry of Earth. These geologists are called geochemists. Geochemists study how atoms and molecules make rocks, soils, minerals, an

6 Focus On Elementary Geology Other modern geologists study how humans affect the water, air, and land quality of Earth. These geologists study Earths environment and are called environmental geolog

Chapter 1 What Is Geology Paying attention to where you live, what happens during storms, and how the land around you changes over time are activities you can do every day. 7 1.5 Summary Geolog

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