Who is a citizen
All the surroundings in which people, plants, and animals live
What is an environment
A person who leaves one country to live in another
What is an immigrant
A person who studies the past
What is a historian
A diagram showing the order in which events took place
What is a timeline
A large area with common features that set it apart from other areas
What is a region
What is a demand
Name one type of an ecosystem
What is a cropland
What is a forest
What is a coast and ocean
What is urban and suburban areas
What is arid and range areas
What is freshwater areas
A quantity of something that is needed or ready for use
What is supply
A large mass of ice
What is a glacier
The weather of an area over a number of years
What is climate
The way a county's people use natural resources, money, and knowledge to produce goods and services
What is an economy?
An object made by humans long ago
What is an artifact
What is a primary source
A method of supplying dry land with water through a series of ditches and pipes
An official account of all the people living in a country, region, state, province, or country
A group of people who share the same customs, language, and history, and often have a common history
What is an ethnic group
An account of the past based on information from primary sources and written by someone who was not an eyewitness to those events
What is a secondary source
What is culture
A period of 100 years
What is a century
The living and nonliving things in a certain area
What is an ecosystem
A choice made to buy a product taking into consideration the future benefits that will result from the product
What is cost-benefit decision
The value of the second best choice when choosing between two things
What is opportunity cost
A culture that has developed complex systems of government, education and religions. These usually have large populations with many people living in cities
What is civilization
A scientist who looks for and studies artifacts
What is an archaeologist