Discuss what the study of chemistry involves. From observations, where did the "stuff" present in our environment come from? From where was it formed. Introduce the term matter and elicit that the matter was formed within the stars. Elicit what forms of matter are observable on the table top. Define chemistry as the study of matter and what is it composed of. From lab demonstration, expand on the definition of chemistry as to include how matter reacts with other matter. Use the formation of table salt, a non toxic compound which is formed by the reaction of toxin chlorine gas with corrosive sodium to a non toxic compound.