<<< Back to Silica	Printing Instructions | Text Version
HOME Slide 1 Slide 2 Slide 3 Slide 4 Slide 5 Slide 6 Slide 7 Slide 8 Slide 9 Slide 10 Slides 11-20 Slides 21-30 Slides 31-40 Slides 41-50 Slides 51-60 Slides 61-70 Slides 71-78 « Previous  |  Next »
TEXT VERSION OF SLIDE: Title: Silica or Silicon Dioxide Type: Text and Picture Slide Speaker Notes: Crystalline silica is composed of silicon and oxygen, both of which are abundant in the earth's crust. Its chemical formal, or the ratio of the amounts of these two elements, is SiO2. Crystalline silica is a naturally occurring component of many minerals, such as granite and feldspar. It is a principal component of sand and occurs in soils.