My Science School

 The word ‘wet’ means moistening. If we dip our hand in water and take it out, it gets covered with a film of water. It is moistened, and the wet film can be removed easily with a towel. The reason for this is that water molecules come in close contact with the skin surface and stick to it. This is known as ‘adhesion’. Water, however, cannot stick to oily skin and drips off because oil and water do not ‘like each other’. In this case, we do not feel the wetness because water does not moisten the skin so well.