Explain why evaporation causes cooling. Give two everyday examples where you observe this phenomenon.

Evaporation causes cooling because the particles with higher kinetic energy escape from the surface of the liquid. This leaves behind particles with lower average kinetic energy, which translates to a lower temperature for the remaining liquid. 

Examples include: 

1. Sweating: When sweat evaporates from our skin, it takes away heat, cooling our body. 

2. Water kept in an earthen pot (matka) becomes cool: The porous surface allows some water to seep out and evaporate, taking latent heat from the remaining water.