How can we help?
You can also find more resources in our
Select a category
Something is confusing
Something is broken
I have a suggestion
What is your email?
What is 1 + 3?
River Valley Terms
A society or culture pertaining to a certain place and time.
The era marked by the development of stone tools.
The era marked by the rise in farming.
The belief in multiple gods.
Pertaining to the head of a family or tribe, always a male.
Pertaining to the head of a family or tribe, a female
Specialization of labor
When work effort is broken into different tasks.
A valley created by the flow of water.
Occurs when a population increases and develops into a city.
Hierarchy / Social stratification
An order or ranking of people, objects,etc.