2-500A 1 - 100 1. Coolant / Evaporation - aids body cooling. 2. High specific heat - bodies of water stay constant temp. 3. Transport/Universal Solvent - polarity - dissolves many substances. 4. Habitat: Major component of internal (organism) & external environments. 5. Cohesion supports animal weight. 6. Adhesion (capillary action) pulls water up plants. 7. Low density of ice - protects life beneath it.