Matter_Comparing+Properties

= Hello boys and girls, =

To facilitate your learning better, I'm giving you additional reading materials for this topic. The first one is on Essential Properties. =Essential vs Non-essential Properties=
 * A property is an attribute or a characteristic of an object.
 * An essential property is the attribute or set of attributes that make an object or substance what it fundamentally is and which it has by necessity. Without that attribute or set of attributes, the object loses its identity.
 * A non-essential property is one which has no necessary connection to the essence of the thing being described.
 * For example, some pupils may say that solids are hard, but this is not an essential property or that solids are heavy (compared to liquids which are light). Not all solids are heavy nor all liquids light.