CHILD DEVELOPMENT PEDAGOGY

Detailed explanation-1: -Adding heat can cause ice (a solid) to melt to form water (a liquid). Removing heat causes water (a liquid) to freeze to form ice (a solid). When water changes to a solid or a gas, we say it changes to a different state of matter. Even though the water’s physical form changes, its molecules stay the same.

Detailed explanation-2: -Melting ice is a physical change since it simply involves a change in the physical state of water, from ice to water in the liquid state. Furthermore, no new chemical substances are created throughout the process, and the transformation is reversible.

Detailed explanation-3: -Molecules move away from each other and ice changes into water. Molecules come closer and ice changes into water. No worries!

Detailed explanation-4: -No new substance is formed during the melting of ice, only a change of state (from solid to liquid) takes place during the melting of ice. So, the melting of ice (to form water) is a physical change. So, the freezing of water (to form ice) is a physical change.