2A, 6 7s, Volume and Population Density

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Across
  1. 3. U.S. unit for density calculations
  2. 5. Word for city areas
  3. 7. Basic resource affecting population density
  4. 11. Factor that increases population density
  5. 12. Population divided by land area
  6. 13. Factor that decreases population density
  7. 14. Common unit for liquid volume
  8. 17. Farmers per unit of arable land
  9. 19. Shape with volume formula ⁴⁄₃πr³
  10. 20. SI unit of volume
  11. 21. Determines how many people can live in one place
  12. 23. Area with high population density
  13. 26. Shape with volume formula l × w × h
  14. 27. People spread out in an area
  15. 29. A rule or equation used to calculate volume
  16. 33. Word describing tightly packed areas
  17. 35. Movement of people into a country
  18. 36. Tool for measuring liquid volume
  19. 37. Helps people live in dense areas
  20. 39. Space that population is spread over
  21. 40. The amount of space an object occupies
  22. 43. Group of people living in a certain area
  23. 45. Unit used for measuring volume
  24. 46. Common unit for density
  25. 47. Essential resource for survival
  26. 48. Another measurement needed for rectangular volume
  27. 51. Condition in high density regions
  28. 52. Large unit of liquid volume used in U.S.
  29. 53. Something populations need to survive
Down
  1. 1. Mass divided by volume
  2. 2. Movement of people out of a country
  3. 4. Study of organisms and their environments
  4. 6. People per unit of land
  5. 8. Shape with volume formula πr²h
  6. 9. Areas outside of cities
  7. 10. Small unit of liquid volume
  8. 15. Shape with volume formula ⅓ × base area × height
  9. 16. Measurement needed to calculate volume
  10. 18. People living close together
  11. 22. Method to measure displaced water volume
  12. 24. Comparison of population to land area
  13. 25. People per unit of arable land
  14. 28. Area with low population density
  15. 30. Method to find volume of irregular object
  16. 31. Maximum population an area can support
  17. 32. Natural living area of a population
  18. 34. Word describing low population density
  19. 38. When too many people live in one area
  20. 41. General movement of people
  21. 42. Third measurement needed for rectangular volume
  22. 44. Counted to find population
  23. 45. What high density areas feel like
  24. 49. Shape with volume formula ⅓πr²h
  25. 50. Needed to calculate volume of prism or pyramid