descending wind
21Tornado — This article is about the weather phenomenon. For other uses, see Tornado (disambiguation). For the current tornado season, see Tornadoes of 2011 …
22List of Mayday episodes — Mayday, also known as Air Crash Investigation(s) in the United Kingdom, Australia and Asia and Air Emergency and Air Disasters in the United States, is a Canadian documentary television program produced by Cineflix investigating air crashes, near …
23North America — North American. the northern continent of the Western Hemisphere, extending from Central America to the Arctic Ocean. Highest point, Mt. McKinley, 20,300 ft. (6187 m); lowest, Death Valley, 276 ft. (84 m) below sea level. 400,000,000 including… …
24thunderstorm — /thun deuhr stawrm /, n. a transient storm of lightning and thunder, usually with rain and gusty winds, sometimes with hail or snow, produced by cumulonimbus clouds. Also called electrical storm. [1645 55; THUNDER + STORM] * * * Violent, short… …
25Mount Everest — Everest redirects here. For other uses, see Everest (disambiguation). Mount Everest (Qomolongma / Sagarmatha) Highest Mountain in the World …
26atmosphere — atmosphereless, adj. /at meuhs fear /, n., v., atmosphered, atmosphering. n. 1. the gaseous envelope surrounding the earth; the air. 2. this medium at a given place. 3. Astron. the gaseous envelope surrounding a heavenly body. 4. Chem. any… …
27Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …
28Paragliding — is a recreational and competitive flying sport. A paraglider is a free flying, foot launched aircraft. The pilot sits in a harness suspended below a fabric wing, whose shape is formed by the pressure of air entering vents in the front of the wing …
29Airfield traffic pattern — An airfield traffic pattern is a standard path followed by aircraft when taking off or landing, while maintaining visual contact with the airfield. At an airport, the pattern (or circuit in the Commonwealth) is a standard path for coordinating… …
30Everest, Mount — Tibetan Chomolungma Nepali Sagarmatha Peak on the crest of the Himalayas, southern Asia. The highest point on Earth, with a summit at 29,035 ft (8,850 m), it lies on the border between Nepal and Tibet (China). Numerous attempts to climb Everest… …
