They are a teaching aid for showing students how the various planets revolve and rotate. With an Earth/Moon/Sun system model you can answer all these questions by just turning the handle.. 1  Why we have day and night. 2  What a year is. 3  What a lunar month is.  Why there is summer and winter.
Currency. Romania's currency is the leu (usually appears in the plural form lei). It comes in Polymer notes. The currency has changed to RON (Romanian new lei). 1 (green) 5 (purple) 10 (Reddish Brown) 50 (Yellow) 100 )Blue) (200 and 500 lei notes are rarely used). The leu's subdivison is the ban (plural form bani), 1 leu = 100 bani), which comes in 1 (brass), 5 (cooper) 10 (steel) and 50 (brass) bani coins.
Until then, they were considered at various points the worldâs least valuable currencies by the Guinness Book of World Records. Romania had printed 1 and 5 million leu notes. Turkey had printed 1, 5, 10, and 20 million lira notes. The 20 million lira note in 2005 was worth US$13.50. Romania and Turkey revalued their currencies in 2005 by lopping off six zeroes and then reissuing bills in smaller denominations.