In what year did British railroad engineers uncover the ancient civilization in the Indus River Valley?

• 1923

• 1856

• 1902

• 1789

What was used as ballast around the railroad tracks?

• Wood chips

• Sand

• Crushed rock

• Plastic

What provided the civilization with rich topsoil for farming?

• Composted waste

• The river's silt

• Imported soil

• Chemical fertilizers

What may be even older than Sumerian writing according to the text?

• Chinese characters

• Egyptian hieroglyphs

• Greek alphabet

• Indus River Valley writing system

What was the main source of water for growing wheat and barley in Harappa and Mohenjo Daro?

• Rainwater

• Lakes

• Underground wells

• Irrigation system of canals

What evidence suggests that the Indus River Valley civilization had a highly advanced knowledge of mathematics?

• The use of abacus

• The uniform size of bricks

• Discovery of calculus

• Astronomical charts

What kind of evidence have archaeologists found that indicates the people of the Indus River Valley were interested in cleanliness?

• Bathrooms and toilets

• Public baths

• Combs, soaps, and medicine

• Laundry facilities

What is one theory about why the Indus River civilization went into decline?

• Global pandemic

• Economic collapse

• Alien abduction

• Invasion by nomadic warriors

What might help us understand more about the people and culture of the ancient Indus River Valley?

• A time machine

• Finding a 'Rosetta Stone'

• Modern technology

• Psychic predictions

What was a possible environmental cause for the civilization's decline?

• Meteor impact

• Rapid climate change

• Nuclear fallout

• Overgrazing and deforestation