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We live on Earth's crust, but there are other layers beneath the crust. They are the mantle and the outer and inner core. In 1915, scientist Alfred Wegener said that about 200 million years ago, Earth once had a single landmass. Hot, molten magma under the surface of the crust pushed the plates apart at a crack in Earth's crust and, eventually, the landmass was split apart and continents were formed. Wegener's work led to the study of plate tectonics.
In this adventurous title, readers learn all about plate tectonics! A brief history of Alfred Wegener's theory of continental drift introduces readers to the development of plate tectonics and how it helped form the Earth we know today. Through colorful images, helpful charts and graphs, and easy-to-read text, readers will discover such fascinating topics as magnetic pole reversal, divergent and convergent plate boundaries, the ocean-continental division, and the San Andreas Fault. A captivating lab activity is featured to encourage children to further explore geology!
Some of the planet’s most destructive forces—including earthquakes and volcanic activity—are caused by the same factors that helped shape much of the Earth as it is today. Plate tectonics, or movement of the Earth’s outer layers, can occur in a number of different ways and produce a range of results, some minor and others far more considerable or devastating. Distinct maps, interesting sidebars, and annotated illustrations of the Earth’s layers are included in this volume, which details the motion of the planet and the nature and study of both earthquakes and volcanoes.
This book provides an overview of the history of plate tectonics, including in-context definitions of the key terms. It explains how the forerunners of the theory and how scientists working at the key academic institutions competed and collaborated until the theory coalesced.
Presents an introduction to volcanoes and earthquakes, explaining how the movement of the Earth's interior plates cause their formation and describing the volcanoes which currently exist around the world as well as some of the famous earthquakes of the nineteenth through twenty-first cenuturies.
Describes plate tectonics and how they cause earthquakes and volcanoes, and discusses how scientists study the nature of earthquakes and volcanic eruptions.
A source of profound influence and controversy, this landmark 1915 work explains various phenomena of historical geology, geomorphy, paleontology, paleoclimatology, and similar areas in terms of continental drift. 64 illustrations. 1966 edition.
Investigating plate motion - Ocean plate boundaries - Changing ocean plate boundaries with time - Plate tectonics and continental crust - What drives the plates?
In the early 1960s, the emergence of the theory of plate tectonics started a revolution in the earth sciences. Since then, scientists have verified and refined this theory, and now have a much better understanding of how our planet has been shaped by plate-tectonic processes. We now know that, directly or indirectly, plate tectonics influences nearly all geologic processes, past and present. Indeed, the notion that the entire Earth's surface is continually shifting has profoundly changed the way we view our world.
Basing their research on geophysics, oral legends, and archaeology, the authors offer evidence that the flood in the book of Genesis actually occurred.