Physical and Chemical Change

By Hudson Brock

Physical Change

Physical changes occur when objects or substances undergo a change that does not change their chemical composition. Evidence would be if it changes its color it changes its physical apperance so it is a physical change. Ex. A rock changes color, A frog changes smell, ripping a piece of paper.

Chemical Change

When chemical reactions occur, the atoms are rearranged and the reaction is accompanied by an energy change as new products are generated. Evidence would be if I cooked a turkey and it changes chemically. Ex. Cooking a chicken, digesting food.

Endothermic

Definition: Accompanied by or requiring the absorption of heat.

Exothermic

Definition: Accompanied by the release of heat.

Percipitate

Definition: To cause a form to be deposited in a solid from a solution.