What is the physical description of nature? 

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The word "nature" can have a lot of different meanings.  In the general context of science, nature usually refers to those things not touched or affected by man.  Wildlife and forests would fall within the realm of this definition.  Different biosystems would have different types of wildlife.  For example, the North American continent would have different animals in the wild than the South American continent.  The forests that those animals inhabit in the North American continent would also take on a different personna as rain forest biomes in the South American continent, specifically the Amazon basin. 

The word "nature" can also be used to describe the geologic activities that occur on the earth, as well.  There are areas on earth that are a hotbed of volcanic activity.  The soil and it's ability to foster plant life in those areas is radically different from non-volcanic areas.  Some areas on the earth's surface are prone to seismic activity, pushing up huge mountain ranges.  The plants and animals that inhabit those raised land-forms again provide a striking contrast to the vegetation and animals that inhabit much lower lying areas.

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Let's limit "nature" to the biosphere itself.  The biosphere is not the entire planet Earth.  The biosphere is only the sections of the planet where life can successfully exist.  In miles, the biosphere extends about 5 miles up into the atmosphere and 5 miles below sea level.  Within that biosphere, nature is divided into different biomes/ecosystems.  Those ecosystems include everything that is living and non-living within it that affects the environment.  Living (biotic) factors will be any and all of the the plants, animals, fungi, bacteria, and protists that live in the area.  The non-living (abiotic) factors will be things like average temperatures, wind, rainfall, air quality, amount of sunlight, etc.  An entire ecosystem is generally what a person is talking about when referring to the physical "being" of nature.  

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