A student cut some fabric into two pieces is this chemical change or physical change?
A. It is chemical change because the size changes
B. It is physical change because there's no reaction
C. It is physical change because the process is reversible
D. It is chemical change because there's no phase change
B. It is physical change because there's no reaction
The correct answer is B. It is a physical change because there is no chemical reaction taking place. Cutting fabric into two pieces does not involve any chemical transformation of the material, but rather a change in physical state. The process is reversible, meaning the two pieces of fabric can be joined back together.
To determine whether cutting fabric into two pieces is a chemical change or a physical change, we need to understand the definitions of these two types of changes.
A chemical change, also known as a chemical reaction, involves the formation or breaking of chemical bonds resulting in the creation of new substances with different chemical properties. Examples of chemical changes include burning, rusting, and cooking.
On the other hand, a physical change does not involve the creation of new substances with different chemical properties. Instead, it alters the physical characteristics of a substance, such as its shape, size, or state of matter, without changing its chemical composition. Examples of physical changes include freezing, melting, boiling, and cutting.
Now, let's apply this knowledge to the question at hand. When a student cuts fabric into two pieces, there is no formation or breaking of chemical bonds, no new substances with different chemical properties are created, and there is no involvement of chemical reactions. Instead, only the physical characteristics of the fabric change, specifically its size and shape.
Based on this information, we can conclude that cutting fabric into two pieces is a physical change. Therefore, option B is the correct answer: It is a physical change because there's no reaction.