Cohesion and adhesion are some of water 's unique properties. These properties allow water to travel up plant stems; cohesion makes the water molecules stick together and adhesion makes the water cling to the stem wall therefore counteracting the downward pull of gravity. Without these properties, water would not reach all cells in a plant as a result the plants could not photosynthesize it and could not release oxygen causing almost all life forms to perish.
Water makes up 75% of the Earth as well as 70-95% of most cells. Water 's ability to retain large amounts of heat with only a slight change in its own temperature is an essential property to ensure life on Earth. The vast bodies of water retain enormous amounts of heat during the day which insures survival for marine life. The water gradually cools during the night releasing its heat into the air making waterfront areas have warmer climates. As a result, water 's high specific heat regulates temperature on land and water to limits that allow life.
Although most substances become denser as a solid due to the atoms rigid structure, water becomes less dense. As water molecules cool down they form a crystal lattice were the
Bibliography: Campbell, Neil A., Reece, Jane B. Biology AP Edition. San Francisco: Benjamin Cummings, . 2005.