WHAT IS A PHISYCAL CHANGE?

Melting:When we heat a solid, it changes into a liquid:    solid+heat=liquid
Evaporation:When we heat a liquid, it changes into a gas:        liquid+heat =gas
Solidification:When we cool a liquid, it changes into a solid:     liquid+cool=solid
Condensation:When we cool a gas, it changes into a liquid:      gas+cool=liquid