| A | B |
|---|
| hydroelectric power | energy generated by falling water |
| free enterprise | people start and run businesses to make a profit |
| emigrate | to move to another country |
| developing countries | countries working to become industrialized |
| death rate | number of deaths per 1,000 people |
| famine | lack of food |
| urbanization | movement of peope to cities |
| tariff | tax added to imported goods |
| language | a way for people to share information |
| acid rain | rain carrying large amounts of chemical pollutants |
| birthrate | number of children born per 1,000 people |
| natural resources | products of the earth that people use to meet their needs |
| irrigating | bringing water to the land |
| pesticides | chemicals that kill insects |
| socialism | government has a central role in the economy |
| Islam | one of the world's major religions |
| developed countries | countries that are industrialized |
| solar energy | energy produced from the heat of the sun |
| pollution | may cause the earth to get warmer |
| population density | average number of people living in a square mile |
| culture | way of life of a group of people who share similar beliefs and customs |
| ethnic group | group of people who share a common culture, language or history |
| dialect | local form of a language that differs from the main language |
| monarchy | government ruled by a king or queen who inherited the right to rule |
| dictator | government ruled by an individual who took control and rules as he/she wishes |
| democracy | government ruled by leaders chosen by a vote of the people |
| economic system | set of rules for how people decide what goods and services to produce and how they are exchanged |
| cultural diffusion | process of spreading new knowledge and skills to other cultures |
| civilization | highly developed culture |
| culture region | different countries that share common traits |
