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.