Adaptation:
Lower Level: Have the students mail the teacher a sample of water
in the lightest container that will not break.
Higher Level: Have the students investigate the relationship between
atmosheric pressure and boiling point. Does the same sample of
water boil at the same temperature at all points around the world?
Have the students analyze the chemical composition of their water samples
including phosphate levels, nitrate levels, pH, conductivity, etc., to
determine differences.
