Life Science CW 1

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Across
  1. 3. organism that survive by hunting
  2. 4. series of chemical reactions that convert light energy, water, and carbon dioxide into the food-energy molecule glucose and gives off oxygen
  3. 6. the light energy converts carbon dioxide and water into a sugar called this
  4. 8. in a photosynthesis reaction both carbon dioxide and water are called these
  5. 9. model showing the amount of energy available in each step of a food chain
  6. 11. all the populations of different species living in the same area at the same time
  7. 12. number of offspring produced over a given time period
  8. 13. model of energy transfer showing how the food chains in a community are interconnected
  9. 16. process during which water vapor changes into liquid water
  10. 18. symbiotic relationship that benefits one species and harms the other
  11. 19. cannot be separated by chemical means
  12. 20. all the organisms of the same species that live in the same area at the same time
  13. 22. the photosynthesis reaction can be represented by using a chemical _______
  14. 23. this reaction occurs when substances change into different substances
  15. 27. organism that gets energy from eating other organisms
  16. 30. a species or population that is at risk but is not yet endangered
  17. 32. parts of Earth and the atmosphere where there is life
  18. 34. process using chemical energy in matter to make food
  19. 36. to set free
  20. 38. a species or population that has died out
  21. 41. model showing how energy flows in an ecosystem
  22. 44. stomata are tiny openings in plants that allow _______ exchange
  23. 49. process that changes atmospheric nitrogen into compounds usable by livable things
  24. 51. symbiotic relationship in which both partners benefit
  25. 52. layer of gases surrounding Earth
  26. 53. Population __________ is the size of a population compared to the amount of space available
  27. 55. living thing in an ecosystem
  28. 56. average weather conditions in an area over time
  29. 58. organism that gets energy from making its own food
  30. 60. carbon dioxide enters the leaf through these tiny holes
  31. 61. to determine roughly the size, nature or extent of something
  32. 62. during photosynthesis plants absorb sunlight in order to make ________
Down
  1. 1. symbiotic relationship that benefits one species but does not harm or benefit the other
  2. 2. water that falls from the clouds to Earth’s surface
  3. 5. process during which liquid water changes into water vapor
  4. 7. number of individuals that die over a given time period
  5. 10. close, long-term relationship between two species that usually involves exchange of food and energy
  6. 14. chloroplast is a green __________ that is the site of photosynthesis
  7. 15. the process by which plants absorb sunlight to make sugar (food)
  8. 17. this travels from the root upward and enters the plant
  9. 19. when a species or population is at risk of extinction
  10. 21. stomata are tiny ________ in plants that allow gas exchange
  11. 24. living and nonliving things in a given area
  12. 25. the word synthesis means to put ________
  13. 26. outputs are what _______ the leaf
  14. 28. this prefix means light
  15. 29. largest number of individuals of one species that an environment can support
  16. 31. in a photosynthesis reaction both glucose and oxygen are called these
  17. 33. photosynthesis is a chemical _________
  18. 35. this word means to put together
  19. 37. anything that restricts the size of a population
  20. 39. place within an ecosystem where an organism lives
  21. 40. glucose is used by plants for this
  22. 42. plants do not need ______ and release it through the stomata
  23. 43. the prefix photo- means this
  24. 45. during photosynthesis plants absorb _______ to make sugar (food)
  25. 46. nonliving thing in an ecosystem
  26. 47. struggle in a community for the same resources
  27. 48. these absorb the sunlight
  28. 50. unicellular organisms without a membrane-bound nucleus
  29. 51. instinctive seasonal movement of a population
  30. 54. what a species does in its habitat to survive
  31. 57. chloroplast is a _______ organelle that is the site of photosynthesis
  32. 59. inputs are what _______ the leaf