Question

Kernels of corn are heated and become popcorn. Why is this a chemical change?

The size and color of the corn have changed.
The kernels change due to their reaction to heat.
The volume of the kernels expands.
The mass of the kernels increases.

Answer 1

It is a chemical change because it cannot be reversed

Step-by-step explanation:

the chemical change means it is irreversible and it changes its characteristics.