Last year, the House was in session for 118 days prior to Election Day and 135 days total. In total, Congress passed 65 laws, the fewest in history. With this almost non-existent work schedule, it appears that the record is not only in doubt but could be obliterated.
Rating Newest Oldest. Best Answer: Common glass contains about 70-72 weight % of silicon dioxide (SiO2). The major raw material is sand (or quartz sand) that contains almost 100% of crystalline silica in the form of quartz.
How glass was made in the ancient world. The ancient glass industry was divided into two categories: glass making, and glass working (1). Glass making workshops were usually situated near places where the raw materials were available. The materials needed to make glass include sand, nitrate, and lots of heat.