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.
The code for the Romanian Leu is RON. The symbol for the Romanian Leu is lei. The Leu is divided into 100 bani. For 2017, one Dollar has equalled average: lei 4.239. minimum: lei 4.158.