Presentation on theme: "Water Facts: Formula = H 2 O Three phases – Solid, liquid, and gas Freezing point = 0˚C Boiling point = 100˚C Inorganic molecule (aka: non- living, does."— Presentation transcript:
Water Facts: Formula = H 2 O Three phases – Solid, liquid, and gas Freezing point = 0˚C Boiling point = 100˚C Inorganic molecule (aka: non- living, does not contain Carbon) Polar molecule Universal solvent About 70% of human body is water
Polarity Polar molecules: slightly positive at one end and slightly negative on the other end Water is a polar molecule!!!!!! Draw a picture definition of polarity on your note sheet in the empty box.
Non-polar molecules: No charge Polar molecules dissolve in water Non-polar molecules do not dissolve in water Like dissolves like
Universal Solvent Solvent – substance that does the dissolving Solute – substance dissolved in a solution Solution – mixture of solvent and solute http://programs.northlandcollege.edu/biology/Biology1111/a nimations/dissolve.html
Density Ratio of the mass of an object to its volume Density = Mass (g)___ Volume (ml) The density of water = 1.0 Density less than 1.0 = floats Density greater than 1.0 = sinks Ice floats, yet cold water sinks in ice, molecules spread out (ex: soda can in freezer) Cold water moves slower than warm water, causing it to sink