High School Earth, Space, and Geophysical Curriculum Essentials May 2009 10. Boulder Valley School District High School Earth, Space, and Geophysical. Science Curriculum Essentials Document. If learning is to endure in a flexible, adaptable way for future use, then teachers must design units.
A curmudgeon with years of practice. Coal ash is the residue from burning coal and contains all of the nonvolatile components of he coal (carbon compounds, sulfur and some metals). The ash is made up of silicates, metals (including toxic metals like mercury and uranium) and some unburnt carbon.
Anthracite coal is a form of coal that is almost made entirely of carbon. Anthracite coal is much harder than other forms of coal such as bituminous, and is usually found in areas surrounding mountains or deep valleys.Anthracite burns much cleaner than other forms of coal due to its low pollutant content.nthracite coal is the cleanest form of coal as it produces very little pollution and does not stain skin when touched, unlike most forms of coal. While anthracite coal is more difficult to burn, it produces more heat than other types of coal.