1. Matter and its properties 1.1. Properties of matter Properties of matter are the aspects of it we can evaluate. These properties can be classified according to dif ferent criteria . Look at the diagram. 8 The text below describes the contents of the glass in the photo: Oil is a yellow liquid that does not dissolve in water. It floats on water because its density (0.9 g/cm3) is lower than that of water (1.0 g/cm3). In the glass there are 50 cm3 of oil and 120 cm3 of water at 20 °C. a) Make a list in your notebook of the properties of matter mentioned. b) Classify each property according to the diagram on this page. A C T I V I T I E S Do they help us to identify the matter? No Yes Their value is given as a number and a unit. For example, its mass is 800 g and temperature is 180 °C. Quantitative properties They are found in all types of matter and they can have any value. For example, its mass, volume or temperature. General properties They depend on the size of the object. For example, its mass or length. Extensive properties They are described in words. For example, its texture is soft and its colour is yellow. Qualitative properties They do not depend on the size. For example, its colour or density. Intensive properties Yes No How do we evaluate them? Do they depend on the size of the matter? PROPERTIES OF MATTER They give each type of matter a characteristic value. It makes it possible to identify it. This value does not depend on the quantity. For example, its density, hardness or conductivity. Characteristic or specific properties 12
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