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Universal natural resources and physical phenomena that lack clear-cut boundaries, such as air, water and climate, as well as energy, radiation, electric charge and magnetism, not originating from civilized human actions. In contrast to the natural environment is the built environment.
Nature is an inherent character or constitution, [ 1 ] particularly of the ecosphere or the universe as a whole. In this general sense nature refers to the laws, elements and phenomena of the physical world, including life. Although humans are part of nature, human activity or humans as a whole are often described as at times at odds, or ...
A natural phenomenon is an observable event which is not man-made. Examples include: sunrise, weather, fog, thunder, tornadoes; biological processes, decomposition, germination; physical processes, wave propagation, erosion; tidal flow, and natural disasters such as electromagnetic pulses, volcanic eruptions, hurricanes and earthquakes. [1][2]
Earth is the third planet from the Sun and the only astronomical object known to harbor life. This is enabled by Earth being an ocean world, the only one in the Solar System sustaining liquid surface water. Almost all of Earth's water is contained in its global ocean, covering 70.8% of Earth's crust.
t. e. Natural science is one of the branches of science concerned with the description, understanding and prediction of natural phenomena, based on empirical evidence from observation and experimentation. [1] Mechanisms such as peer review and reproducibility of findings are used to try to ensure the validity of scientific advances.
The Great Soviet Encyclopedia of 1979 defines landscape science as "the branch of physical geography that deals with natural territorial complexes (or geographic complexes, geosystems) as structural parts of the earth's geographic mantle" and states that "The basis of landscape science is the theory that the geographic landscape is the primary ...
A landform is a natural or anthropogenic [1][2] land feature on the solid surface of the Earth or other planetary body. Landforms together make up a given terrain, and their arrangement in the landscape is known as topography. Landforms include hills, mountains, canyons, and valleys, as well as shoreline features such as bays, peninsulas, and ...
A natural arch.. Physical geography can be divided into several branches or related fields, as follows: Geomorphology [7] [8] is concerned with understanding the surface of the Earth and the processes by which it is shaped, both at the present as well as in the past.