What Is Hip-Hop? A Music, History, Art, and Culture Lesson This lesson, re-posted on Education World with permission from Seattle radio station KEXP, was created by Tiffany Producer-KEXP Documentaries. The entire series of lesson plans appears here. Also see on EducationWorld: Hip-Hop Lesson: DJs and Turntablism
sal volatile. 1. an aromatic alcoholic solution of ammonium carbonate, the chief ingredient in smelling salts. Some say water was thrown into the flame, others that it was Spirits of sal volatile. He disengaged one of them presently, and felt in his pocket for the sal volatile.
In planetary science, volatiles are the group of chemical elements and chemical compounds with low boiling points that are associated with a planet's or moon's crust or atmosphere. Examples include nitrogen, water, carbon dioxide, ammonia, hydrogen, methane and sulfur dioxide. In astrogeology, these compounds, in their solid state, often comprise large proportions of the crusts of moons and dwarf planets.