Complex sentence: Silicon dioxide, also known as silica (from the Latin "silex"), is an oxide of silicon with the chemical formula, most commonly found in nature as quartz and in various living organisms.
Split into simpler sentences: Silicon dioxide, also known as silica (from the Latin "silex"), is a chemical compound that is an oxide of silicon with the chemical formula. Silica is most commonly found in nature as quartz, as well as in various living organisms.