These printable worksheets are designed to cover the Science learning area of “Natural and Processed Materials” with 10-12 year old students. At this level the students should be able to identify the factors which enable the choice of a particular material for a specific purpose. They should also understand how the properties of materials can be changed using various processes. The students will be involved in predicting, testing, analyzing, assessing, illustrating and researching information to write up reports. The lesson activities include changing the properties of materials, an analysis of the component parts of common objects, examining how the properties of some foods change with processing and additives and completing a home survey and report on hazardous chemicals.