| A | B |
| Taiga | great coniferous forest of Canada and southern Siberia(Russia) |
| Steppe | grasslands found in dry regions of the world with a wide variety of temperatures |
| Censor | to control the content of written or spoken communication |
| Confederation | a union made up of many different parts |
| Tributary | a stream or river that flows into a larger body of water |
| Polder | a piece of land reclaimed from water, usually by building dikes and pumping the water out |
| Czar | the title given to the rulers of Russia in the past |
| Superpower | a large and powerful country that plays a leading role in world affairs |
| Maritime | relating to, or bordering on the sea |
| Immigrant | a person who comes into one country from another to settle permanently |
| Acid Rain | precipitation that contains acid from burning fossil fuels. This can harm the environment |
| Parliament | the most important legislative body of countries that have this type of representative system(UK example) |
| Tariff | a tax on imports or even on exports |
| Communism | a social system in which property and goods are owned in common |
| Arid | very dry, making agriculture difficult |
| Democracy | a social system in which property and goods are owned by individuals |