Earth as a Dynamic Planet

This lesson introduces Earth as an active, evolving system rather than a fixed ball of rock. Students learn how internal heat, gravity, solar energy, and time drive geological change at scales ranging from sudden earthquakes to billion-year continental cycles.

Professor Victoria Okafor frames geology as the science of reading evidence: rocks, landscapes, fossils, structures, and modern measurements. The lesson establishes core ideas that later lessons will build on, including Earth systems, deep time, plate movement, and the rock cycle, without yet going deeply into mineral identification, fossil succession, or detailed tectonic boundary types.