AP BIOLOGY

Detailed explanation-1: -Water likes to stick to itself, but under certain circumstances, it actually prefers to stick to other types of molecules. Adhesion is the attraction of molecules of one kind for molecules of a different kind, and it can be quite strong for water, especially with other molecules bearing positive or negative charges.

Detailed explanation-2: -Water is very adhesive; it sticks well to a variety of different substances. Water sticks to other things for the same reason it sticks to itself – because it is polar so it is attracted to substances that have charges.

Detailed explanation-3: -Adhesion is caused by the polarity of water. Water molecules have an uneven sharing of electrons due to covalent bonding. This creates a negative and positive end of each water molecule. This results in water being attracted to other molecules.

Detailed explanation-4: -This is because the water molecules are attracted to the charged glass walls of the capillary more than they are to each other and therefore adhere to it. This type of adhesion is called capillary action.