Question

12 multiple answer 1 point physical changes describe changes in matter without changing the identity of the matter. (what you start with is what you end with) chemical changes are changes where completely new substances are formed. which of the examples below represent physical changes. (choose all that apply) burning wood salt dissolving in water. water vapor condensing to form clouds. limestone breaking down from acid rain melting ice tearing paper. digesting food tarnishing silver rusting iron. breaking a pencil in half coloring paper in rainbow colors.

Explanation:

Physical changes involve no change in the identity of matter. Salt dissolving in water is a dissolution process without new - substance formation. Water vapor condensing to form clouds is a phase change from gas to liquid of water. Melting ice is a phase change from solid to liquid of water. Tearing paper and breaking a pencil in half are just physical breakage without new substances. Coloring paper in rainbow colors just adds color on the surface without chemical reaction. Burning wood, limestone breaking down from acid rain, digesting food, tarnishing silver, and rusting iron all involve chemical reactions forming new substances.

Answer:

B. salt dissolving in water, C. water vapor condensing to form clouds, E. melting ice, F. Tearing paper, J. breaking a pencil in half, K. coloring paper in rainbow colors