Introduction to "Why? The Earth" Samcheongapja Dongbangsak, 180,000 Years Old The Earth is Round How Did the Earth Come into Existence? How Did Land and Ocean Come into Existence? The Appearance of the First Organism-Precambrian Era What Kind of Organisms Lived in the Paleozoic Era? The Mesozoic Era-the Era of Dinosaurs The Cenozoic Era, When Human Ancestors First Appeared The History of the Earth in the Strata Dongbangsak's Past Moving Continents The Earth's Main Axis-the Mantle and the Core Volcanic Eruptions-the Earth's Fireworks The Features of a Volcano Why Do Earthquakes Occur? What to Do in an Earthquake Mythical Continents Orogeny, the Process of Mountain Formation The Life of a Mountain The Shape of Korea What Makes Up the Crust Meandering Rivers-Erosion How Strata are Formed Fossils-Treasures Buried in the Strata Petroleum and Coal-Valuable Underground Resources Sedimentary Rocks-Layers of Rocks Igneous Rocks-Rocks Formed by Volcanoes Metamorphic Rocks-Rocks with Changed Properties Rocks That Change Due to Weathering From Rocks to Soil-The Power of Organisms Deserts-Dry Land The Circulating World of Water The Power of Water to Change Topography Subterranean Water Flows, Too Going on a Cave Exploration Hot Springs and Geysers Mountain Ranges Exist Even in the Ocean Why Does Seawater Move? What is a Trench? The Arctic and the Antarctic Our Incredible Earth The Earth is Hurting Only One Earth
Earth's Features * What are the layers of Earth? (Áö±¸ÀÇ ³»ºÎ´Â ¾î¶² ±¸Á¶Àϱî?) * Why? The Earth Structure of the Earth How Did Land and Ocean Come into Existence?