currency -money system
dollars, pounds, RMB yuan, yen, rupees, Euro, won, peso, fcfa, lira, dinara?, lacag, HKD
jail = cigarettes
elementary school = candy, game cards, slime
archeologist - studies history, physical history
B.C. - before Christ (2000 years ago)
600 BC - 2600 years ago
precious metals= gold, silver, platinum, Ancient Egypt- aluminum
precious stones = diamonds, rubies, emeralds,
Periodic Table
iron - symbol Fe
gold - Au
silver - Si
CO2 - carbon dioxide
H2O -hydrogen + 2 oxygen = water
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