The video introduces two types of geologic processes: exogenic and endogenic. Exogenic processes originate on or above the Earth's surface, while endogenic processes originate within the Earth. Exogenic processes are linked to the atmosphere, hydrosphere, and biosphere, and they involve degradation processes like weathering, mass wasting, erosion, and transportation. These are collectively known as denudation, referring to the stripping or uncovering of the Earth's surface.

Weathering is the process by which rocks and other substances break down on the Earth's surface. There are two main types: physical (mechanical) weathering and chemical weathering.

Physical weathering involves the physical breaking of rocks into smaller pieces without changing their chemical composition. Key types include pressure, temperature (expansion and contraction due to heating and cooling, common in deserts), frost weathering (stress from freezing water), and abrasion (wearing away by mechanical action of other rocks, caused by gravity, moving water, strong winds, and ice glaciers). Organic activity, where plant roots grow into rocks, and human activities like burning fossil fuels and off-road driving, also contribute to physical weathering. Burrowing animals also cause biological weathering by digging holes and exposing new rock surfaces.

Chemical weathering involves chemical reactions that change the composition of rocks and minerals. It requires water and happens more rapidly at higher temperatures, making it common in warm and wet climates. The main agents are water, carbon dioxide, and oxygen. Oxygen, when mixed with water and iron, causes rust (oxidation). Carbon dioxide dissolved in rainwater forms carbonic acid, which weathers marble and limestone, leading to the formation of stalactites and stalagmites.

Erosion is the process by which surface processes remove soil or dissolved material from one location and transport it to another. It involves the movement of rock and particles by wind, water, ice, or gravity. Geomorphic agents of erosion include flowing water (fluvial morphology), wind (aeolian landscapes), tides and waves (coastal morphology, involving hydraulic action, attrition, abrasion, and solution), and moving ice (glacial morphology).