Problem: Bird migration:

Most migrations begin with the birds starting off in a broad front. Often, this front narrows into one or more preferred routes termed flyways. These routes typically follow mountain ranges or coastlines, sometimes rivers, and may take advantage of updrafts and other wind patterns or avoid geographical barriers such as large stretches of open water. The specific routes may be genetically programmed or learned to varying degrees. The routes taken on forward and return migration are often different. A common pattern in North America is clockwise migration, where birds flying North tend to be further West, and flying South tend to shift Eastwards.

How do most migrations begin?
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A: the birds starting off in a broad front


Problem: Zinc:

Similar alloys with the addition of a small amount of lead can be cold-rolled into sheets. An alloy of 96% zinc and 4% aluminium is used to make stamping dies for low production run applications for which ferrous metal dies would be too expensive. In building facades, roofs or other applications in which zinc is used as sheet metal and for methods such as deep drawing, roll forming or bending, zinc alloys with titanium and copper are used. Unalloyed zinc is too brittle for these kinds of manufacturing processes.

Why isn't unalloyed zinc used in construction applications?
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A: too brittle


Problem: Premier League:

Its main body is solid sterling silver and silver gilt, while its plinth is made of malachite, a semi-precious stone. The plinth has a silver band around its circumference, upon which the names of the title-winning clubs are listed. Malachite's green colour is also representative of the green field of play. The design of the trophy is based on the heraldry of Three Lions that is associated with English football. Two of the lions are found above the handles on either side of the trophy – the third is symbolised by the captain of the title winning team as he raises the trophy, and its gold crown, above his head at the end of the season. The ribbons that drape the handles are presented in the team colours of the league champions that year.

What is the Premier League Championship trophy based on?
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A: The design of the trophy is based on the heraldry of Three Lions that is associated with English football.


Problem: Alaska:

Employment is primarily in government and industries such as natural resource extraction, shipping, and transportation. Military bases are a significant component of the economy in the Fairbanks North Star, Anchorage and Kodiak Island boroughs, as well as Kodiak. Federal subsidies are also an important part of the economy, allowing the state to keep taxes low. Its industrial outputs are crude petroleum, natural gas, coal, gold, precious metals, zinc and other mining, seafood processing, timber and wood products. There is also a growing service and tourism sector. Tourists have contributed to the economy by supporting local lodging.

How, specifically, have tourists helped the local economy in Alaska?
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A:
supporting local lodging