Hi, need to submit a 1250 words paper on the topic Physical Properties of Materials. The appearance of a substance is the first aspect that is observed before embarking on the details of other physical properties. Various substances have characteristic appearances that set them apart from other materials. Water, for example, is usually described as a clear colourless liquid. Though many other substances have this appearance, careful scrutiny of other physical properties helps to ascertain that indeed the liquid is water. Gold has a bright yellow shiny appearance especially when it is a large mass. Silver, on the other hand, has a bright, white metallic appearance. The appealing appearances of gold and silver make them the most popular metals in the manufacture of jewellery.

Ductility is the capacity of a substance to distort under the effect of tensile force. This property enables metals to be stretched and shaped into wires. Malleability, conversely, is the ability of a substance to distort under the influence of compressive forces. This property makes it possible for metals to be moulded and hammered to form sheets. Gold is one of the most malleable and ductile metals ever known. Silver is ductile and malleable as well though not as malleable and as ductile as gold.

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An increase in temperature often causes changes in the physical states of materials. For example, solids often change to liquids and liquids change to vapor. Conversely, a decrease in temperature causes materials to revert to their original states. The instants at which these modifications occur are referred to as phase transitions (“Physical Properties of Material”). The change of a solid to a liquid is known as melting. The temperature at which this process happens is the melting point. The conversion of a liquid to vapor usually occurs at a transition temperature referred to as the boiling point.&nbsp.

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