High School Earth, Space, and Geophysical Curriculum Essentials May 2009 9. Boulder Valley School District High School Earth, Space, and Geophysical. Science Curriculum Essentials Document. Enduring Understandings. are the big ideas central to a content area that have lasting value beyond the classroom and.
See also: Coal gasification and Coal seam gas. Coal gas is a flammable gaseous fuel made from coal and supplied to the user via a piped distribution system. Town gas is a more general term referring to manufactured gaseous fuels produced for sale to consumers and municipalities.
coal gas-gaseous mixture produced by distillation of bituminous coal and used for heating and lighting. town gas-coal gas manufactured for domestic and industrial use. fuel-a substance that can be consumed to produce energy; more fuel is needed during the winter months; they developed alternative fuels for aircraft.