In this module you will learn to describe physical and chemical change operationally. Physical change happens when only the size, shape, or form of the material and without changing its composition. The application of force, pressure, and heat can cause a material to undergo a physical change. A chemical change is a change that involves the transformation of a material into a substance due to the action or presence of heat and other substances such as acid.

Practice Exercise 1 Write PC on the statement that explains physical change and CC for chemical change.

1. Does not involve a chemical reaction. 2. The original substance is lost and a new substance is formed
3. It is usually a reversible change.
4. The original characteristics of the substance remain the same.
5. The formation of curdling precipitates ( when milk curdles)
6. Cutting, tearing, shattering, grinding, and mixing can change the form but not the composition of a material.
7. One or more new substances are formed.
8. Examples include burning paper, digestion of food, bananas browning.
9. Only the size, shape, and form changed.
10. Change involves the transformation of a material into a substance due to the action or presence of heat and other substances such as acid. ​