Lesson 2 5.4

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Across
  1. 6. is not decreasing.
  2. 7. the chemical in plants that traps energy from the Sun and gives plants their green colour
  3. 9. a consumer that eats only other animals
  4. 11. by using a natural predator or disease
  5. 13. a new plant
  6. 14. factors: living factors in the environment
  7. 15. habitat
  8. 17. the last known
  9. 18. extinction and very small numbers remain
  10. 20. ecosystem: an ecosystem that is diverse and able to provide for the needs of the organisms living
  11. 21. part of the stem, root or leaf that is able to grow
  12. 22. organisms that have the same food source and live in the
  13. 24. raised bank built to prevent water reaching buildings
  14. 26. occur
  15. 27. the term used to describe differenttypes of living things
  16. 30. species: species that are close
  17. 31. reduction burning: regular burning to reduce the amount of fuel available for a fire
  18. 32. species: species that is experiencing a rapid population decline and is in danger of becoming extinct if the drop in numbers.
  19. 35. control: a method of controlling unwanted
Down
  1. 1. vegetation: native vegetation that remains unchanged when surrounding areas have been changed by activities such as grazing or forestry.
  2. 2. plain: area along the banks of rivers and streams that is flooded when water levels are
  3. 3. has died
  4. 4. organisms
  5. 5. breaking down dead matter and waste products
  6. 7. an interaction between two organisms in which one of them benefits but the other one is not affected
  7. 8. the place where all life exists; consists of Earth and its atmosphere
  8. 10. characteristics that help an organism to survive in its environment
  9. 12. a scientist who studies
  10. 16. term used to describe a species that has not been seen in the wild for over 50 years, and of
  11. 19. species: species that has low numbers, often spread out over a large area; the
  12. 23. over a long period of time
  13. 25. growing of plants
  14. 28. organisms that must eat other organisms to get the energy and nutrients they need; animals are
  15. 29. organisms that get the energy they need
  16. 33. factors: non-living factors in the environment
  17. 34. season: times of the year when fires are most likely