Geography

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Across
  1. 5. a tropical grassland with scattered trees
  2. 7. a large area of land covered chiefly with trees and undergrowth
Down
  1. 1. a vast and cold region characterized by permafrost and low-growing vegetation
  2. 2. a large flat area of land with few trees
  3. 3. a group of interconnected trees and plants in a specific area
  4. 4. an area with very little rainfall and very few plants, very hot
  5. 5. a large flat treeless plain in Europe or Asia
  6. 6. a treeless polar desert found north of the arctic circle