Friday, March 6, 2009

Physical & Chemical Properties

Physical properties-is any aspect of an object or substance that can be measured or perceived without changing its identity.


Examples:

color

smell

freezing point

boiling point

melting point


Chemical properties-is any of a material's properties that becomes evident during a chemical reaction.


Examples:

appearance

texture 

color

odor

density



Wednesday, March 4, 2009

Heterogeneous mixture & Homogenous mixture

Heterogeneous mixture-is made of different substances that remain physically separate.


Examples:

sandy water 

carbonated beverage or beer 

orange juice with pulp in it 

water with ice cubes in it 

chicken noodle soup

sugar and salt mixed in a bowl



Homogeneous mixture-the mixture which has uniform composition through out its mass.


Examples:

air

sugar solution

alloys

soft drinks

salt solutions

dental fillings