Hostile Witness. A witness at a trial who is so adverse to the party that called him or her that he or she can be cross-examined as though called to testify by the opposing party. The Federal Rules of Evidence provide that witnesses who are hostile, or adverse, can be interrogated through the use of leading questions. hostile witness
Polar wander. Polar wander is the motion of a pole in relation to a fixed reference frame. It can be used, for example, to measure the degree to which Earth's magnetic poles have been observed to move relative to the Earth's rotation axis.
A polar molecule is a molecule that has a mostly positive charge on one side and a mostly negative charge on the other. This charge difference allows the positive end of the molecule to attract to the negative end of another.olar molecules sometimes form hydrogen bonds. A polar molecule cannot bond with a non-polar molecule. Because the oxygen side is negatively charged, water is an example of a polar molecule.