| A | B |
|---|
| estuary | an area where the tide meets the river current |
| lingua franca | a common language used among people with different different native languages |
| nuclear family | family group made up of husband, wife and children |
| pidgin | a simplified speech used among people who speak diffent languages |
| poaching | illegal hunting of protected animals |
| savannas | tropical grasslands containing scattered trees |
| sedentary farming | farming carried on at permanent settlements |
| shifting cultivation | clearing forests to plant fields for a few years and then abandoning them |
| wadi | the desert stream bed that is dry except during heavy ranins |
| erg | a sea of sand created by high, shifting sand dunes |
| reg | a gravel-covered plain in a desert area |
