Week4_Prompt#3

Many cold packs used for sports injuries are activated by bending the package causing the substance inside to chemically react because the hot heat is calming the person down. Like if you have a bump or something is sparn they usually put some cold ice on it. The reason is because the ice is a solid and the solid particles are together and doesn't move. The heat package is either a gas or a liquid. Heat is involed in this process because the heat brings down the pain so it wouldn't hurt so much.