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2014-11-20T23:12:57+08:00

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Physical properties - are characteristics that are determined without altering the chemical composition of matter. we can easily observe these properties by using our senses. for example, if you are ask to describe your physical properties, you would probably say, you stand 5 ft 4 in tall, you weight 115 lbs, with brown eyes, black hair, and fair complexion. on the other hand, pure water can be described as .colorless, odorless, and tasteless, liquid. it is boils at 100 C and freezes at 0 C. physical properties can further be classified to its dependency on the  amount or quantity of materials observed are called extensive properties. example of extensive property are mass, volume, length, and shape. on the other hand, properties that depend on the kind or quality of materials observed (but not on the amount) are called intensive properties. example of intensive property are color, taste, melting,point, boiling point, density, luster, and hardness.

chemical properties - of matter describe the changes that occur in chemical composition that take place during chemical reactions with other substances. these properties are often "hidden". usually, they can be observed when substances react in the presence of air, an acid, an base, or other chemicals or when they are heated. chemical reactions occur within the body, during digestion and metabolism. for example, the food that we eat is broken down into simpler forms by the digestive track or the organs of digestion. other external factors can also cause chemical changes in the body. for example, when we perm our hair to change its shape and when we get sunburn, human skin chemically changed. example of chemical properties are biodegradability, reactivity, combustion, and corrosion.
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