This How Small is It? lesson plan also includes:
Students better understand what a concentration of one part per million means through activities. Students discuss "Maximum Contaminant Level" of a toxic in the water. They measure the classroom to find out how many cubic centimeter blocks are needed in the classroom to represent one part per million. They determine the number of sheets of paper needed to have one million square centimeters, and determine the number of drops of water in one milliliter.