Geography

Concepts to cover

1. Savanna: grassland with scattered trees; tree growth checked by fire, grazing herbivores and seasonal rainfall
2. Temperate grasslands: prairie, steppe, pampas, veld, downs; wheat and ranching
3. Hot desert vegetation: xerophytes, oases; Sahara and Thar life
4. Cold deserts (Ladakh, Gobi) and tundra vegetation; permafrost and reindeer herding