Ancient world civilizations

Which civilization discovered that the world is round and revolves around the sun?

Which of these saw a huge population drop and an increase in farming productivity?

Which is also known as the "Dark Ages" because of widespread cultural and economic decline?

Which pioneered aqueducts, plumbing and sanitation?

Who was the first to believe that their citizens should be able to vote for their government?

Which civilization created the Olympic games?

Which is considered to have the first modern justice system?

Which civilization invented cartography? This allowed for better ocean travel and trade.

Which civilization contributed the first network of roads that increased trade and travel?

Which of these had a feudal system in which peasants served nobles in return for protection?

Which of these civilizations was the most organized and run from a central location?

Which civilization lost almost half of its population to the Plague in the 1300s?

Which of these would have used a catapult to attack a castle?

During which period were the Crusades?

Which of these allowed women to vote?

Which civilization created the study of knowledge, reality, and existence? (philosophy)