Programme For International Student Assessment Pisa / Sample Science Passage 6: Acid Rain


Statues called Caryatids were built on the Acropolis in Athens more than 2500 years ago. The statues are made of a type of rock called marble. Marble is composed of calcium  carbonate. 

In 1980, the original statues were transferred inside the museum of the Acropolis and were replaced by  replicas. The original statues were being eaten away by acid rain. 



A marble chip has a mass of 2.0 grams before being immersed in vinegar overnight. The chip is removed and dried the next day. What will the mass of the dried marble chip be?

Between 2.0 and 2.4 grams
Exactly 2.0 grams
More than 2.4 grams
Less than 2.0 grams