CONTINENTAL DRIFT & PANGAEA. In 1912, Alfred Wegener proposed the idea that the continents were once part of a huge land mass, called Pangaea (all lands), that later broke apart. He was convinced because:. 1. the continent’s shape roughly fit together like a puzzle. - PowerPoint PPT Presentation
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Plate Tectonic movement shapes the Earth• Plate tectonics = process that underlies earthquakes and volcanoes
and that determines the geography of the Earth’s surface- Earth’s crust and upper mantle are separated into lithospheric
plates that move in different directions and at different rates• Crust = lightweight thin component of Earth’s surface• Mantle = malleable layer on which the crust floats composed of
silica and magnesium oxides• Core = molten heavy center of Earth made mostly of iron and