Do a series of activities showing water as a medium that carries, mixes and separates chemicals, which links the life and the rocks of planet earth.
Science content (2016 curriculum):
Chemistry: States of Matter, Properties of Materials (K-7)
Chemistry: Physical Changes, Solutions, Mixtures and Separating (2, 4, 5, 6)
Earth/Space: Water cycle, Water conservation (2)
Earth/Space: Sustainable practices, Interconnectedness (2, 5, 7)