TABLE OF CONTENTS CHAPTER 1 Going Up Coming Down 5 CHAPTER 2 What Is Gravity 9 CHAPTER 3 Gravity on Earth and Beyond 17 SCIENCE IN ACTION Fun with Gravity 26 Focus on Gravity 28 Glossary 30 To Learn More 31 Index 32
CHAPTER 1 GOING UP COMING DOWN Diego swings the bat With a loud crack he hits the baseball The ball soars into the air The ball’s path makes an arc Soon the ball starts to come down All sports involve gravity in one way or another
