Answer:
Step-by-step explanation:
Leaves changing color is a chemical change because it involves a transformation of the chemical composition of the pigments within the leaves. During this process, the green pigment chlorophyll breaks down, revealing other pigments such as carotenoids (which produce yellow, orange, and brown colors) and anthocyanins (which produce red and purple colors). These pigments undergo chemical reactions that change their molecular structures, resulting in new colors.
In a physical change, the substance itself remains the same, but its physical properties may change, such as its shape, size, or state (solid, liquid, gas). However, in the case of leaves changing color, the chemical composition of the pigments is altered, resulting in a new substance with different properties. Therefore, this process is considered a chemical change.