Interdependence Gizmo Probasco

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Across
  1. 3. In a food chain, each organism eats one other ___________.
  2. 6. When the beans become more plentiful, bird populations _______ as well.
  3. 9. Consumers can be either herbivores or _____________..
  4. 13. _____________ eat plants and animals
  5. 14. The organisms in an ecosystem rely on each other for their survival. This relationship is called _______________.
  6. 16. __________now number over 500,000 and there are about 700 black-footed ferrets in the wild.
  7. 17. When European-American settlers first started exploring the region, there were as many as 50 million bison (commonly called _________).
  8. 20. In the game, Birds and the Beans, students that collect at least 3 beans “__________.” reproduce In the game, Birds and the Beans, students that collect at least 6 beans not only survive, but also “____________.”
  9. 21. Species such as pronghorns, prairie dogs, and burrowing owls also declined due to hunting, poisoning and __________ loss.
  10. 23. The most familiar producers are ________, which get their energy from the Sun. consumers Organisms that rely on other organisms for energy are called _________. Herbivores ______________ are consumers that eat plants,
  11. 24. When the bird population decreases, the bean populations can _________.
  12. 27. The prairie will never be the same as it once was, but with attention and care what is left can be ____________.
  13. 29. Agricultural scientists are finding ways to convert many annual crops such as wheat, sunflowers and sorghum into perennials with deep root systems that will _________ soil loss.
  14. 31. An _________is a combination of the living and non-living elements of a particular environment.
  15. 33. The word perennial means “continuing” or “perpetual,” and perennials continue to _________ without being replanted.
  16. 35. Removing prairie dogs will increase the grass population and decrease the ferret and fox _____________.
Down
  1. 1. When European-American settlers first started exploring the region, over a billion ______ dogs living on the ____________.
  2. 2. A habitat is the physical ___________including the landscape, soils, water, and climate.
  3. 4. Phytoplankton is the producer in an _________ ecosystem.
  4. 5. When beans are _________, bird populations decrease as well.
  5. 7. Carnivores eat _________.
  6. 8. Feeding relationships can be represented by food _________.
  7. 10. Rich prairie soils are also prime _________ land, and since the late 1800s much of the prairie has been fenced off and converted to farms and ranches.
  8. 11. The American prairie once stretched from the Rocky Mountains to Indiana, from Texas to central _________.
  9. 12. In the game, Birds and the Beans, students that collect 2 beans or less “________.”
  10. 15. Native grasses adapted to frequent __________ by growing deep root systems to extract moisture from the soil.
  11. 18. The American prairie was once a great _________ stretching from the Rocky Mountains to Indiana, from Texas to central Canada.
  12. 19. The word annual means yearly, and annuals must be ___________ every year.
  13. 22. Real ecosystems are much more complex. Food webs are __________ that show how all the food sources for each type of organism.
  14. 25. Food chains generally begin with producers, organisms that don’t depend on other organisms for their __________.
  15. 26. Today less than 2% of the original 3.6 million square kilometers (1.4 million square miles) of prairie in North America are ______________.
  16. 28. During the 1870s the great bison __________ were systematically slaughtered until only an estimated 25 bison remained alive in 1894.
  17. 30. In the simplified ecosystem, prairie dogs eat grass, __________ eat prairie dogs, and foxes eat ferrets.
  18. 32. An ecosystem consists of a ____________ – all the living things, or organisms, in the ecosystem.
  19. 34. Today many prairie species are making a __________.