Are the following examples of chemical or physical changes?

Question

Column A
1.
Digesting lunch:
Digesting lunch
2.
Cutting your hair:
Cutting your hair
3.
Crumbling up your snack wrapper:
Crumbling up your snack wrapper
4.
Grilling chicken:
Grilling chicken

Answer 1

Let's classify each example from Column A as either a chemical change or a physical change:

1. Digesting lunch: This is a chemical change because it involves breaking down food into its chemical components through various biochemical processes.

2. Cutting your hair: This is a physical change because it involves a change in the appearance of the hair without altering its chemical structure.

3. Crumbling up your snack wrapper: This is a physical change because it changes the shape and size of the wrapper but does not change its chemical composition.

4. Grilling chicken: This is a chemical change because it involves cooking the chicken, which results in changes to its chemical structure and composition due to the heat, resulting in new substances and flavors.

In summary:

1. Chemical change
2. Physical change
3. Physical change
4. Chemical change