What on Earth? This reading comprehension work revolves around facts and myths about our own planet. Extend your childs reading skills and help ideas take root with this downtoearth workbook. Table of Contents: Introducing … the Earth How Big Is One Billion? How It Got Here Where Are We in Space? Early Myths Neighbors: The Sun and the Moon Whats the Earth Made Of? What It Looks Like Earth Extremes The Continents The Ocean Who Lives on It? Perceptions of the Earth Make a Map Natural Resources Factors Affecting Seed Germination How We Can Take Care of the Earth The Big, Blue Marble