(1) The benchmark for science content standard 2 at the end of grade 4 is that the student will:

(a) create mixtures and separate them based on different physical properties (e.g., salt and sand, iron filings and soil, oil and water) ;

(b) examine, measure, describe, compare, and classify objects in terms of common physical properties;

(c) identify the basic characteristics of light, heat, motion, magnetism, electricity, and sound;

(d) model and explain that matter exists as solids, liquids, and gases and can change from one form to another;

(e) identify that the position of an object can be described by its location relative to another object and its motions described and measured by external forces acting upon it;

(f) identify, build, and describe mechanical systems and the forces acting within those systems; and

(g) observe, measure, and manipulate forms of energy, sound, light, heat, electrical, and magnetic.