Article: Conventional ("tailhook") aircraft rely upon a landing signal officer (LSO, radio call sign paddles) to monitor the aircraft's approach, visually gauge glideslope, attitude, and airspeed, and transmit that data to the pilot. Before the angled deck emerged in the 1950s, LSOs used colored paddles to signal corrections to the pilot (hence the nickname). From the late 1950s onward, visual landing aids such as Optical Landing System have provided information on proper glide slope, but LSOs still transmit voice calls to approaching pilots by radio.

Question: What did LSO's use to signal corrections to the pilot prior to the angled deck designs introduced in the 1950's?
Ans: colored paddles


Article: Wood unsuitable for construction in its native form may be broken down mechanically (into fibers or chips) or chemically (into cellulose) and used as a raw material for other building materials, such as engineered wood, as well as chipboard, hardboard, and medium-density fiberboard (MDF). Such wood derivatives are widely used: wood fibers are an important component of most paper, and cellulose is used as a component of some synthetic materials. Wood derivatives can also be used for kinds of flooring, for example laminate flooring.

Question: What widely-used product is almost always made of wood fibers?
Ans: paper


Article: Abnormal discoloration of wood often denotes a diseased condition, indicating unsoundness. The black check in western hemlock is the result of insect attacks. The reddish-brown streaks so common in hickory and certain other woods are mostly the result of injury by birds. The discoloration is merely an indication of an injury, and in all probability does not of itself affect the properties of the wood. Certain rot-producing fungi impart to wood characteristic colors which thus become symptomatic of weakness; however an attractive effect known as spalting produced by this process is often considered a desirable characteristic. Ordinary sap-staining is due to fungal growth, but does not necessarily produce a weakening effect.

Question: What's the name for the pretty coloring effect caused in some wood by rot-producing fungi?
Ans: spalting


Article: The centre of Southampton is located above a large hot water aquifer that provides geothermal power to some of the city's buildings. This energy is processed at a plant in the West Quay region in Southampton city centre, the only geothermal power station in the UK. The plant provides private electricity for the Port of Southampton and hot water to the Southampton District Energy Scheme used by many buildings including the WestQuay shopping centre. In a 2006 survey of carbon emissions in major UK cities conducted by British Gas, Southampton was ranked as being one of the lowest carbon emitting cities in the United Kingdom.

Question: What utility company sponsored a carbon emissions survey in 2006?
Ans:
British Gas