The British Isles lie at the juncture of several regions with past episodes of tectonic mountain building. These orogenic belts form a complex geology that records a huge and varied span of Earth's history. Of particular note was the Caledonian Orogeny during the Ordovician Period, c. 488444 Ma and early Silurian period, when the craton Baltica collided with the terrane Avalonia to form the mountains and hills in northern Britain and Ireland. Baltica formed roughly the northwestern half of Ireland and Scotland. Further collisions caused the Variscan orogeny in the Devonian and Carboniferous periods, forming the hills of Munster, southwest England, and southern Wales. Over the last 500 million years the land that forms the islands has drifted northwest from around 30S, crossing the equator around 370 million years ago to reach its present northern latitude.
What formed the hills of Munster and the southern part of Wales?
Variscan orogeny

London's most popular sport is football and it has fourteen League football clubs, including five in the Premier League: Arsenal, Chelsea, Crystal Palace, Tottenham Hotspur, and West Ham United. Among other professional teams based in London include Fulham, Queens Park Rangers, Millwall and Charlton Athletic. In May 2012, Chelsea became the first London club to win the UEFA Champions League. Aside from Arsenal, Chelsea and Tottenham, none of the other London clubs have ever won the national league title.
How many of the football clubs in the Premier League are based in London?
five

The first successful light bulb filaments were made of carbon (from carbonized paper or bamboo). Early carbon filaments had a negative temperature coefficient of resistance as they got hotter, their electrical resistance decreased. This made the lamp sensitive to fluctuations in the power supply, since a small increase of voltage would cause the filament to heat up, reducing its resistance and causing it to draw even more power and heat even further. In the "flashing" process, carbon filaments were heated by current passing through them while in an evacuated vessel containing hydrocarbon vapor (usually gasoline). The carbon deposited on the filament by this treatment improved the uniformity and strength of filaments as well as their efficiency. A metallized or "graphitized" filament was first heated in a high-temperature oven before flashing and lamp assembly. This transformed the carbon into graphite which further strengthened and smoothed the filament. This also changed the filament to have a positive temperature coefficient, like a metallic conductor, and helped stabilize the lamp's power consumption, temperature and light output against minor variations in supply voltage.
What material were the first light bulb filaments made from?
carbon