3. Primary treatment. The wastewater still contains organic solid matter-or human waste. The next stage is to seperate this from the water, and to do this, we put the wastewater into large settlement tanks, which causes the solids to sink to the bottom of the tank. We call these settled solids âsludgeâ.
Between 2004 and 2014, the share of STEM-related bachelor's degrees earned by women decreased in all seven discipline areas: engineering; computer science; earth, atmospheric and ocean sciences; physical sciences; mathematics; biological and agricultural sciences; and social sciences and psychology.
The difference between STEM and STEAM. 1  Students who study arts for 4 years in high school score 98 points higher on the SATs compared to those who study the same for half a year or less. 2  Students who took up music appreciation scored 61 points higher on the verbal section and 42 points higher on the math section.