The Seven Roles of the President Name: ______________________________________________ SKILL: CIvICSThe job of the U.S. President is really seven jobs in one. What are those responsibilities? Read about them below. Then answer the following questions. A. Chief of the Executive Branch The President oversees federal (national) agencies, appointing their directors and creating policies to determine their goals during his term.
What does the term Parts Per Million (PPM) mean? Total dissolved solids (TDS) is typically expressed in parts per million (ppm). PPM is a common unit for measuring the concentration of elements in the nutrient solution. One ppm is one part by weight of the mineral in one million parts of solution.
Units of Measure. A unit of measure is the amount of chemical found in a specific volume of waterâfor example, pounds/gallon or teaspoons/gallon. It is also called concentration units, or simply units. The four common units of measure used in drinking water analysis results are mg/L, Âµg/L, ppm, and ppb. Milligrams per liter (mg/L) is equivalent to ppm (parts per million). To convert mg/L to Âµg/L simply multiply by 1000 (1 mg/L = 1000 Âµg/L).