The next time you snag a window seat on an airline flight, check out the planeâs wing. There is a good chance the tip of the wing will be angled upward, almost perpendicular. Or it might bend smoothly up like the tip of an eagleâs wing in flight. Though obviously more complex, these wing modifications have the same aerodynamic function as the folded wingtips of a paper airplane.
scoria - the scum formed by oxidation at the surface of molten metals. slag, dross. scum - a film of impurities or vegetation that can form on the surface of a liquid. basic slag - slag produced in making steel; low in silica but having large amounts of calcium phosphate; useful as fertilizer.
A cinder cone or scoria cone is a steep conical hill of loose pyroclastic fragments, such as either volcanic clinkers, cinders, volcanic ash, or scoria that has been built around a volcanic vent.he most famous cinder cone, Paricutin, grew out of a corn field in Mexico in 1943 from a new vent. Eruptions continued for 9 years, built the cone to a height of 424 meters, and produced lava flows that covered 25 kmÂ². The Earth's most historically active cinder cone is Cerro Negro in Nicaragua.