The Penny Experiment Flashcards
Paola lives in Seville, Spain.
The streets of her city are lined with beautiful orange trees.
The oranges that grow here are sometimes called bitter oranges because they are sharp to the taste.
Tourist like to see flamenco,
a colorful style of Spanish dancing
…or visit a royal palace [that is] called the Alcazar
The Statue of Liberty is made of copper.
Paola noticed a greeen copper statue of the composer Beethoven in Central Park…
Paola also noticed a green copper roof on a famous old building [that is] called The Dakota.
Paola brought home some souveniers. One of the souvenirs wasn’t something you could buy in a store, though.
Paola is something of an amateur coin collector. So every time she travels, she brings home some money from that part of the world.
Paola asked her mother why the pennies were green. Her mother explained that the pennies had gone through a process called oxidation. This is a chemical reaction that can take place on metal.
Paola emptied the bowl of vinegar, salt, and pennies into a colander over the sink, and let all the liquid drain out.
Oxidation creates a substance on metal. This substance on copper is green. It is called verdigris.
Paola rode her bike up the street to the Giralda, a very old bell tower in Seville. It was completed in the year 1198.
