The attraction between molecules of different substances.

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adhesion

​The attraction between molecules of the same substance.

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cohesion

A chemical bond that involves sharing a pair of electrons between atoms in a molecule.

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covalent bond

​The mass per unit volume.

density

A layer of water in which the salinity changes rapidly with changes in depth. (A.K.A. transition zone)

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halocline

​A type of weak chemical bond formed when the slightly positive hydrogen atom of a polar covalent bond in one molecule is attracted to the slightly negative atom of a polar covalent bond in another molecule.

hydrogen bond

​An atom or group of atoms that has a positive or negative charge.

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ion

A chemical bond resulting from the attraction between oppositely charged ions.

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ionic bond

A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.

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molecule

A molecule with an unequal distribution of charge, resulting in the molecule having a positive end and a negative end.

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polar molecule

A measure of the amount of dissolved salts in a given amount of liquid.

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salinity

​A measure of how difficult it is to stretch or break the surface of a liquid.

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surface tension

A liquid's resistance to flowing.

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viscosity