IS

• Covalent bond


  A type of chemical bond that happens when two atoms share their electrons with each other
• Polarity


  This makes H2O a polar molecule, which means there is an unequal distribution of electrons within the molecule
• Electrons are pulled toward oxygen
• This results in a partial negative charge
• Cohesion


  Water molecules are attracted to each other and stick together because of hydrogen bonds
• Hydrogen bond


  A bond formed between water molecules when partially positive H is attracted to nearby other molecules' negative O
• WATER PROPERTIES It has a chemical formula of H2O and naturally exists on Earth in its three phases. The hydrogen atoms and oxygen atom are joined by a covalent bond.
• SURFACE TENSION The cohesive force between water molecules is so strong that it creates a surface tension that can resist an external force.
• ADHESION Water molecules are also attracted to other objects, like glass, plastic, or even leaves. This attractive force is called adhesion.
• CAPILLARY ACTION The strong cohesion and adhesion of water molecules enable them to move upward against gravity in a narrow tube, known as capillary action. Capillary action occurs when the adhesion of water to the surface material is stronger than the water molecules' cohesive forces.
• LOWER DENSITY AS SOLID

  Below O°C, water is solid or it becomes ice, When water cools, it begins to move slowly and expands until it freezes. The molecules align themselves into a crystal lattice and are spaced further apart.
• HIGH SPECIFIC HEAT Water has high specific heat capacity which is the amount of heat that must be absorbed or lost for 1 gram of substance to change is temperature by 1°C.

  The greater the specific heat capacity, the greater the heat required to increase its temperature.
• HIGH SPECIFIC HEAT Water molecules create strong hydrogen bonds with other water molecules. Heat is needed to be absorbed first to break hydrogen bonds. Thus, water has a higher boiling point than at other liquid. Pure water at sea level boils at 100°C.
• EVAPORATIVE COOLING Heat of vaporization is the amount of heat needed to turn 1 gram of a liquid into water vapor (gaseous state). When water is heated, the liquid's average kinetic energy will increase enough to break molecular attractions and escape the air as gas. The surface of the liquid where evaporation occurs cools down in a process called evaporative cooling. Sweat uses body heat from our skin and evaporates, taking away heat in our skin and decreases body temperature.