CONTENTS INTRODUCTION CHAPTER 1 PLANET EARTH CHAPTER 2 THE STRUCTURE OF EARTH 23 CHAPTER EARTH s SPHERES 38 CHAPTER 4EARTH S CYCLES 55 CHAPTER SEARTH's SATELLITE THE Moon 65 CHAPTER A PHYSICAL CHA RCTERISTICS OF THE Moon 76 88 89 CONCLUSION GoSSARY For MORE INFORMATION BIBLIOGRAPHY 94 INDEX 95
OJ ong ago Earth was the subject of great speculation Ancient astronomers such las Ptolemy thought that Earth was the center of the universe Likewise there have been all sorts of assumptions about Earth s satellite the Moon One of the most inter esting beliefs was that moonlight was capable of driving a person crazy Using a telescope Galileo Galilei went on to show that the Sun was actually the center of the universe And while some folks still believe that a full Moon brings out the weird in people they have plenty of solid evidence that proves the Moon has real natural effects on Earth For instance the gravitational pull of the Moon dur ing its many phases influences ocean tides Many additional facts about Earth and the Moon have been discovered over the years The results of years of research into the nature of Earth and the Moon are the subject of this book More is known about Earth than any other planet in the solar system mainly because scientists have had the advantage of living here Even before the advent of helpful tech nology such as the telescope and computers scientists managed to find ways to figure out certain characteristics of the planet These included its size shape and movement For instance ancient Egyptians measured
Earth and its Moon
Going through daily life, people may be inured to the fact that Earth takes up a small fraction of a solar system, let alone the universe.
About This Book
By: Michael Anderson
Illustrated by:
Published by: Rosen Publishing provided by Britannica
