Chapter 3.2, Problem 12PP

Interpretation Introduction

Interpretation: The type of change that takes place in the following cases should be described-

1. Pie dough rolled into thin pieces for crust
2. A Silver pin tarnishes in air
3. Tree is cut into boards at saw mill
4. Food is digested
5. A chocolate bar melts

Concept Introduction:

• Physical property is the property that can be observed or measured without changing the element, like color, shape and volume.
• Chemical properties describe the ability of a substance to change into a new substance.
• The change in physical property is referred to as a physical change while the change in chemical properties is chemical change.