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The Tips and Helpful Words explain the scientific details easily while reading the Story. Long ago, people used to think that the Earth was flat and plain-shaped everywhere. But someone asked “Is that really so?”, and more discovery led to the realization that the Earth is round like a ball. It is important that we ask questions about what we take for granted and how we tend to think. What kind of questions, then, did scientists ask lately? And what did they find out? Table of Helpful words ● Do other planets have land and sea? ● What does the sea floor look like? ● Why does hot water come out of the ocean floor? ● Did land and sea look the same as they do today? ● What is the evidence that all continents used to be one landmass? ● Did the ground split slowly or quickly? ● What would happen when the ocean floor splits quickly? ● How much water is there inside the Earth? ● How did layered sedimentary rocks form? ● How did fossils form? ● What would happen to people and animals? ● What happened when the volcano Mt.St. Helens erupted? ● How could a piece of land sink beneath another? ● How fast did the grounds move? ● Where did the water that used to cover the Earth go? ● Couldn’t all the fish die if the lava heated the ocean waters? ● How did the Ice Age come about? ● When did the dinosaurs live? ● What do the land masses that sunk look like today? 3. The age group this book is written for is a picture book. Just looking at the pictures will give you glimpses of the contents. The words were written at a simple level so that they can be read as easily as looking at the pictures. However, reading the words, the pictures, and the helpful words together carefully will help you understand catastrophic plate tectonics more deeply. This book was written to be understood by little children, grade school students, middle and high school students, and even adults. Anyone can read it!