But convection currents are ultimately at the mercy of temperature differences because these are what create pressure differences in the first place. The pressure difference between two locations is called a pressure gradient, and the force that actually moves air as wind is called the pressure gradient force.
oÂ·nus. n. 1. A difficult or disagreeable responsibility or necessity; a burden or obligation. 2. Responsibility for an error or fault; blame: Each side wants to avoid the onus of having started the disagreement. 3.
Picture of Anus. Anus: The opening of the rectum to the outside of the body. The word anus comes straight from the Latin. It referred to the same structure to the Romans. It also meant a ring in the sense of an encirclement which was entirely appropriate since the anus encircles the outlet of the bowel. Image Source: MedicineNet, Inc. Text: MedicineNet, Inc.