Indus
Valley
Veda
100

large landmass that is set apart from the rest of the continent

subcontinent
100

fortified area

citadel
100

groupings based on ones skill

varnas

200

a main river and all of the other rivers and streams that drain into it 

river system

200

information used to prove something

evidence

200

term for an occupation based; meaning "birth group"

jati

300

help shape life in this region

monsoons

300

to move from one region to another in order to live there

migrate

300

position in society 

status
400

accomplishment that requires effort or skill

achievements

400

a collection of hundreds, and even thousands of sacred hyms

Veda

500

special building used to hold grain

granary

500

is a fixed social class into which a person is born

caste