EVERYDAY SCIENCE

Detailed explanation-1: -When you heat ice, the individual molecules gain kinetic energy, but until the temperature reaches the melting point, they don’t have energy to break the bonds that hold them in a crystal structure. They vibrate more quickly within their confines as you add heat, and the temperature of the ice goes up.

Detailed explanation-2: -No particles are destroyed and none are added. In addition, the size and shape of the particles does not change. Therefore matter, and mass (or weight), is conserved (stays the same) during phase change, contrary to what many students think.

Detailed explanation-3: -As energy is transferred to the water molecules in the ice, the motion of the molecules increases. The motion of the molecules increases enough that it overcomes the attractions the water molecules have for each other causing the ice to melt.

Detailed explanation-4: -Ice melts when heat energy causes the molecules to move faster, breaking the hydrogen bonds between molecules to form liquid water.

Detailed explanation-5: -The number, size and shape of individual particles stay the same when ice melts. For both ice and water, the warmer the temperature, the more the particles move.