Cohesion, Adhesion, and Surface Tension Properties of Water: Cohesion, Adhesion, and Surface Tension

ITEM # 11 Nov. 8, 2018 Fold your notebook page in half. Draw lines to divide page into 6 boxes for note.

Cohesion The ability of water molecules to stick to other water molecules is known as cohesion. Puddles of water on a flat surface Cohesion is responsible for the tension on the surface of water that permits you to fill a glass with water beyond the top.

Adhesion The ability of water molecules to stick to other types of molecules. Water droplets on a car windshield

Surface Tension The pull on the surface of liquids caused by the attraction of the molecules to one another. (cohesion) Surface Tension makes it seem that there is a thin, elastic cover on the liquid. It allows insects to walk on water.

Buoyancy The upward force on an object in a liquid or gas. Buoyancy allows boats to float and makes a rock feel lighter in water than in air. Buoyancy- if an object pushes away more water weight than its own weight then the object will float.

density Amount of matter present in a given volume D=m/v Styrofoam metal

Capillary action Rise of a liquid through a tiny opening or tube Capillary action gives plants the ability to absorb water from the ground. (Xylem)

Specific Heat Specific heat is another physical property of matter. The temperature of matter is a direct measure of the motion of the molecules: The greater the motion the higher the temperature: The energy required to raise the temperature of one gram of any substance 1 degree Celsius.

Amoeba Sisters: Properties of Water TOTD What makes water so unique? What does it mean water is polar? How does water get up the tree from the roots? Why can insects walk on water? Why don’t fish die when pond freezes in winter? How is high specific heat for water important?