While we drink the water through straw we suck the air inside the draw. While we suck it some air inside the draw comes up to our mouth and there is less amount of air inside the straw in more space. So the pressure of the air is decreased inside the straw. While there is a difference in pressure the atmosphere tries to balance it. So the air outside the straw which is at high pressure tries to enter into the straw and so it pushes the water on the surface of the container. This makes the water to go inside the straw.
The earthen pot contains small pores. The water tries to go out through this holes but it gets evaporates on the outer surface of the pot. For the water to change from its liquid to vapour state it needs energy. This energy is taken from the remaining water inside the earthen pot as heat energy. So the water inside the earthen pot gets cooled.
If the tea is poured in a plate the tea will be cooled fast. But if it is in glass then it will cool slowly. From this we can understand that the surface area of the tea is less in the glass and the surface area is more in the plate. So the heat transfer easily takes place where there is more surface area. So to increase the surface area we make the hot tea poured from higher distance to lower distance and the tea cools fast.
The outside atmospheric air always contains some water in the invisible state (Gaseous State). When the cool drink or cold water in the bottle cools the outside air, the outside air gives some water in the visible state (Liquid State). The water from the outside air stays at the outside of the bottle and looks like the bottle sweats.
When we walk out of the home and see the sky a question arises in our mind. Why is the sky blue? We will think we have studied that in the sky there are sun, planets and stars. But there are no other elements to give light. But when we look sun and stars they are not blue in colour. Then why does the sky look blue in colour? Here is the shortest answer and longest answer to know deeply.