Indus River Valley Quiz Study Guide KEY TERMS Monsoon—strong winds that blew across East Asia (India) Citadel—a fortress usually located at the cities center Subcontinent—a large landmass that juts out of a continent (Asia) Indus River—main river located in western India. Mohenjo-Daro located along river Migrate—when people move from one area to another area to live Aryans migrated into the Indian Subcontinent Caste—a strict division or separation of the social classes in India A Planned City: Mohenjo-Daro Indoor plumbing Sewer system Wells for water Great Bath Granary Homes made with a standard sized brick Caste System—a strict division of social classes Born into it You CANNOT move out of your caste System is connected to the Hindu religion Aryan Migration Migrated from Central Asia Came through the Hindu Kush mountain passes Brought their own language Had their own religion Believed in the Caste System Were able to conquer Indus Valley because they had Horse drawn Chariots Indus River Valley—contact had been limited for centuries because of location Himalayan Mountains made it difficult to move from place to place fertile land provided a surplus of food