EVERYDAY SCIENCE

Detailed explanation-1: -The change from the liquid state to the solid state is called freezing. As the liquid cools, it loses thermal energy. As a result, its particles slow down and come closer together. Attractive forces begin to trap particles, and the crystals of a solid begin to form.

Detailed explanation-2: -With an increase in temperature, the particles move faster as they gain kinetic energy, resulting in increased collision rates and an increased rate of diffusion. In a solid, the particles pack together as tightly as possible in a neat and ordered arrangement.

Detailed explanation-3: -As the temperature of a solid, liquid or gas increases, the particles move more rapidly. As the temperature falls, the particles slow down. If a liquid is cooled sufficiently, it forms a solid.

Detailed explanation-4: -As the temperature is reduced the kinetic energy of particles decreases because kinetic energy is directly proportional to temperature. If temperature of the system increases kinetic energy also increases.

Detailed explanation-5: -Heating a liquid increases the speed of the molecules. An increase in the speed of the molecules competes with the attraction between molecules and causes molecules to move a little further apart. Cooling a liquid decreases the speed of the molecules.