When we refer to the properties of a material, we are talking about ____ we can sense, measure or test. For example, if we have a sample of metal in front of us, we can identify that this material is grey, hard and shiny. Testing shows that this material is able to conduct ____ and electricity and that it will react with an acid. These are some of the metals' properties.  Physical properties refer to properties that can be observed or measured without ____ the composition of the material. Examples include colour, hardness and smell and freezing, melting and boiling points.  Chemical properties are discovered by observing chemical ____. They include combustion point, reactivity with acids and toxicity.

Properties of materials

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