Distinguish between objects that occur in nature and objects made by people. K-5 Science Content Themes PUSD Science Standards Units 1. Physical Science A units Properties of objects and materials, Position and motion of objects, Light, Heat, Electricity, and Magnetism. The position of the object can be described by locating it relative to another object or the background. Heat can be produced in many ways, such as burning, rubbing and mixing substances.
Heat can move from one object to another by conduction.