Geography Crossword

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Across
  1. 4. occurs in areas with drier climates
  2. 6. dissolves nutrients in the soil
  3. 7. a high humus level helps produce ____ in the soil
  4. 8. large area of Precambrian rock that forms the core of a continent
  5. 14. prairie higher precipitation levels caused grasses to grow longer than in other places
  6. 15. trees also known as broadleaf trees
  7. 17. prairie little precipitation causes grasses to be shorter than in other areas
  8. 20. ______ must have moisture and heat for their survival
  9. 23. most of the tundra has this
  10. 24. between grasslands and boreal forest is the third grassland sub-region, called ________
  11. 25. come from parent material
  12. 27. vegetation plants that grow without any human interference.
  13. 29. seeds long-grass prairie is ideal for growing grains and _________________
  14. 30. solid rock beneath the soil
Down
  1. 1. located above the tree line
  2. 2. trees known as needle-leaved trees
  3. 3. able to live with limited amounts of rainfall
  4. 5. action water from below drawn up to replace the water in the topsoil
  5. 9. well-balanced mixture of sand, silt, clay, and humus
  6. 10. what plants and animals are decomposed by
  7. 11. zones areas of change
  8. 12. forest contains both coniferous and deciduous trees
  9. 13. provides nutrients and moisture for plants
  10. 16. and taiga forest largest vegetation region in Canada
  11. 18. forest area of mature forest that has never been cut down
  12. 19. natural feature on Earth's surface
  13. 21. layer top meter or so of permafrost that thaws during the summer
  14. 22. top layer of soil containing humus
  15. 26. consists of minerals, bacteria and organic materials; air; and moisture
  16. 28. forest lush forest in an area with very heavy precipitation