| A | B |
|---|
| currents | moving streams of ocean water |
| typhoons | tropical storm systems in Asia |
| weather | unpredictable changes in the air during short periods of time |
| hurricanes | tropical storm systems that form over the Atlantic Ocean |
| climate | an area's usual weather pattern over long periods of time |
| savannas | broad grasslands with few trees |
| Mediterranean climate | areas with mild, rainy winters and hot, dry summers |
| humid continental climate | areas with long, cold snowy winters and short, very hot summers |
| marine west coast climate | climate of coastal areas that get wind from the ocean |
| rainforests | dense forests in the tropics |
| dialect | local form of language that differs from the main language |
| cultural diffusion | process of spreading new knowledge and skills to other cultures |
| civilization | highly developed culture |
| economic system | rules for how goods and services are produced and exchanged |
| culture | way of life of a group of people who share similar beliefs and customs |
| urbanization | people's movement to cities |
| death rate | number of deaths for every 1,000 people |
| refugees | people forced to flee from their countries |
| emigrants | people who leave their country and move to another |
| birthrate | average number of births for every 1,000 people |
