Ecosystems on land

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Across
  1. 4. A tropical forest, usually of tall, densely growing, broad-leaved evergreen trees in an area of high annual rainfall.
  2. 5. Elevation above sea level
  3. 6. A biome where grasses are the main plant life
  4. 8. The average weather conditions in an area over a long period of time
  5. 9. A group of ecosystems with similar climates and organisms
  6. 11. An extremely dry area with little water and few plants
Down
  1. 1. land dominated by trees and other woody vegetation
  2. 2. the single environmental factor closest to a tolerance limit for a given species at a given time
  3. 3. a large natural elevation of the earth's surface rising abruptly from the surrounding level; a large steep hill.
  4. 7. Distance north or south of the equator
  5. 10. A community of organisms and their abiotic environment
  6. 12. effect the process by which rising air on one side of a mountain releases all of its moisture so that the opposite side receives only dry air.