Life Science CW 1

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