When you put your tongue on ice, it can feel as if it is sticking to the surface. This phenomenon is due to the process of adhesion, which is the attraction between two surfaces that are in contact with each other.

There are several reasons why your tongue sticks to ice. One reason is due to the temperature difference between your tongue and the ice. When your tongue comes into contact with the cold surface of the ice, the temperature of your tongue decreases, causing the molecules in your tongue to slow down and become more sluggish. As a result, the molecules in your tongue are more likely to come into contact with the molecules on the surface of the ice, which can cause the two surfaces to become stuck together.

Another reason why your tongue sticks to ice is due to the properties of water. Water is a polar molecule, which means that it has a positive charge at one end and a negative charge at the other. When water molecules come into contact with each other, they can form hydrogen bonds, which are weak bonds that hold the molecules together. When your tongue comes into contact with the ice, the water molecules on the surface of your tongue can form hydrogen bonds with the water molecules on the surface of the ice, causing the two surfaces to become stuck together.

Finally, your tongue may stick to ice due to the presence of saliva on the surface of your tongue. Saliva is a water-based substance that contains a variety of proteins and other molecules, and it can contribute to the adhesion of your tongue to the ice.

In conclusion, your tongue sticks to ice due to the process of adhesion, which is the attraction between two surfaces that are in contact.