There are six commonwealth-owned parks in Bucks County: 1  Five are owned and operated by the Pennsylvania Bureau of State Parks, part of the Pennsylvania Department of Conservation and Natural Resources (DCNR). 2  Bucks County Parks and Recreation operates an 18-bed youth hostel in the Nockamixon State Park Weisel estate.
lithosphere definition: Lithosphere is defined as the rock and crust surface that covers the Earth. (noun) An example of lithosphere is the Rocky Mountain range in western North America....
Define photosphere. photosphere synonyms, photosphere pronunciation, photosphere translation, English dictionary definition of photosphere. n. The directly visible outer layer or atmosphere of a star, especially of the sun. phoâ²toÂ·spherâ²ic adj. n the visible surface of the sun, several hundred...