Basic purpose of this lecture is to present on Matter and Change; in terms of Properties of Matter. A physical property is a quality or condition of a substance that can be observed or measured without changing the substance’s composition. The mass of an object is the amount of matter the object contains. A golf ball has a greater mass than a table tennis ball. The golf ball, therefore, contains more matter. Here also briefly describe on What is matter; What is mass and how does it compare to weight and What word is used to describe the amount of space an object takes up.