Simple instruments, such as magnifiers, provide more information than scientists obtain using only their senses. Scientists review and ask questions about the results of other scientists' work. Physical Science Properties of objects and materials Objects have many observable properties, including size, weight, shape, and color. Objects are made of one or more materials, such as paper, wood, and metal. Objects can be described by the properties of the materials from which they are made, and those properties can be used to separate or sort a group of objects or materials.
Materials can exist in different states.
Position and motion of objects The position of an object can be described by locating it relative to another object or the background. An object's motion can be described by tracing its position over time. The position and motion of objects can be changed by pushing or pulling. The size of the change is related to the strength of the push or pull. Light, heat, electricity, and magnetism Magnets attract and repel each other and certain kinds of materials.