The first scientist to suggest that continents move was ridiculed; now we know it's true. The earth's crust floats around on a semi-liquid mantle, and that causes most earthquakes and volcanoes. In this course, we'll see how that and other geologic forces shape and re-shape the solid earth.
Astronomy, Geology, Meteorology and Oceanography.
For over 4 billion years, earth has been making and remaking rocks. In this course, we'll learn what rocks can tell us about the earth, and which ones are common or useful.