These materials, including teacher's guide, student test booklet and laboratory guide, student workbook, test booklet, and a booklet explaining the answers to the questions in the test booklet, are first trial versions of a unit that will form part of the Australian Science Education Project instructional materials for grades seven through ten. The emphasis is on student investigation of simple phenomena, leading to the development and application of a model of particulate adhesion and cohesion. There is a short core portion all students are expected to complete, and nine options from which students may choose. Topics investigated include: wetting, capillarity, adhesives, detergents, lubrication, strength of soap films, viscosity, monomolecular layers, and chromatography. The teacher's guide contains suggestions for organization of the unit, a bibliography and film list, equipment list, and notes on the activities suggested in the student's manual as well as ideas for additional activities that may be added or substituted. (AL)