UE Méthodologies / وحدات التعليم المنهجية

The subject of this text is geology, from the Greek geo (Earth) and logos (discourse). Geology is the science that pursues an understanding of planet Earth. Understanding Earth is challenging because our planet is a dynamic body with many interacting parts and a complex history.
Throughout its long existence, Earth has been changing. In fact, it is changing as you read this page and will continue to do so. Sometimes the changes are rapid and violent, as when landslides or volcanic eruptions occur. Just as often, change takes place so slowly that it goes
unnoticed during a lifetime. Scales of size and space also vary greatly among the phenomena that geologists study.
Sometimes geologists must focus on phenomena that are microscopic, such as the crystalline structure of minerals, and at other times they must deal with features that are continental or global in scale, such as the formation of major mountain ranges.