The World in which we live is been molded by forces, which influence the motion, shape, behavior and energy of objects. The efficient control of energy transfer and transformation is integral to the organization and development of life. Learners explore the effects of forces in their lives. They consider methods of harnessing energy, the way energy is used, and the social and environmental consequences of energy use. The key concepts of the Energy and Change strand are: (i) the forces acting on objects influence their motion, shape, behavior and energy in interactions and changes, (ii) energy is transferred and transformed but is not created or destroyed, and (iii) there are different ways of obtaining and utilizing energy and these have different consequences.