The unit presented in this teacher's guide is the first of two developed for the fifth year in the Science Curriculum Improvement Study (SCIS) curriculum. Attention is focused on energy transfers involved in the interaction of matter in solid, liquid, and gaseous forms. The chapters are presented in six parts which include activities for reviewing experimental procedure, identifying energy transfer, investigating energy transfer as by temperature change and motion, investigating energy transfer during melting and dissolving, and two projects. Each chapter provides the teacher with a section on advance preparation, teaching suggestions, and optional activities. The design and use of the equipment kit are described. (PR)