Region A term used in geography that describes an area of the Earth where some natural or human-made phenomena display similar traits. Regional Metamorphism Large scale metamorphic modification of existing rock through the heat and pressure of plutons created at tectonic zones of subduction . Regolith Loose layer of rocky material overlying bedrock . This type is any young underdeveloped soil that lacks identifying soil horizons . The ratio between the actual amount of water vapor held in the atmosphere compared to the amount required for saturation.
Relative humidity is influence by temperature and atmospheric pressure .
Relief The range of topographic elevation within a specific area. The gathering of information from an object or surface without direct contact. Remote Sensor Mechanical devices used to remotely sense an object or phenomenon. The expression of map scale as a mathematical ratio. Reptile Group of terrestrial vertebrate animals that includes turtles, tortoises, snakes, lizards, crocodiles, and alligators.