When given a problem that is clearly described, students should have the opportunity to plan and conduct their own experiments to come to their own conclusion. Student conclusions should then be compared with accepted science theory. The hands-on nature of this Core increases the need for teachers to use appropriate precautions in the laboratory and field. Guidelines for proper use of animals, equipment, and chemicals in the classroom should be observed. Science Benchmark Chemical change is a primary way that matter on earth changes from one form to another.
Energy is involved in chemical and physical change.
When chemical or physical changes occur, matter and energy are always conserved. Matter can change state through physical change. In a chemical change the identity of the atoms does not change. Changing the amount of energy in a chemical system alters reaction rate. Describe the chemical and physical properties of various substances.