Why doesn’t change in a substance during a physical change?

there is no change because a physical change only changes the physical appearance of a substance

Explanation:

a chemical change is the only change that can change a substance since it changes the chemical properties of the substance, hence making a new substance

freezing

deposition

condensation

explanation;

melting also called fusion is the process where solid becomes liquid, sublimation is the process where solid becomes gaseous without first changing to liquid, deposition involves change from gaseous to solid state, freezing involves change from liquid to solid, boiling or evaporation involves change of liquid to gaseous state, while condensation is the change from gaseous state to liquid state.

endothermic reactions involves absorption of heat from the surroundings or the environment while exothermic reactions involves loss of heat energy to the surroundings.

in this case, sublimation, evaporation and melting are endothermic reactions (gain energy from the environment) while, freezing, deposition and condensation are exothermic (loss of energy to the surroundings) reactions.

a lot of it means it can be "burned" for energy and sold at one price. if it is scarce, the price will go up