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Science Crossword

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Across
  1. 4. Blood vessels that carry blood back to the heart
  2. 5. Canal The area that sound waves pass through to reach the eardrum
  3. 8. Multicellular eukaryote that produces its own food through photosynthesis
  4. 11. An organism that is internally warmed by a heat-generating metabolic process
  5. 12. A flower structure that encloses and protects ovules and seeds as they develop.
  6. 13. Cells The two new cells that result from mitosis and cytokinesis
  7. 16. Tissue composed of fibers that can contract causing movement of an organ or part of the body
  8. 17. Any organic compound whose molecule contains one or more hydroxyl groups attached to a carbon atom.
  9. 18. Produces pollen
  10. 19. selection Organisms most adapted to environment are more likely to survive.
  11. 22. the act of concealing the identity of something by modifying its appearance
  12. 23. A connective tissue that is more flexible than bone and that protects the ends of bones and keeps them from rubbing together.
  13. 27. event A disastrous event
  14. 28. Female part of the flower
  15. 30. Isolation Isolation between populations due to physical barriers
  16. 36. The height of a wave's crest
  17. 37. Basic unit of life
  18. 38. A scientist who studies fossils
  19. 40. Mineralized connective tissue.
  20. 42. The stalk of a flower's carpel with the ovary at the base and the stigma at the top.
  21. 48. The clear tissue that covers the front of the eye
  22. 49. Decay The breakdown of a radioactive element releasing particles and energy
  23. 51. An animal without a backbone
  24. 54. Division of the cytoplasm during cell division
  25. 55. A force that pushes on or squeezes a material.
  26. 58. Control Center of the cell
  27. 60. flowering plants
  28. 62. a coiled bony fluid-filled tube in the inner ear; sound waves traveling through the cochlear fluid Trigger Nerve impulses
  29. 63. A hypothesis that has been tested with a significant amount of data
  30. 65. A ring of muscle tissue that forms the colored portion of the eye around the pupil and controls the size of the pupil opening
  31. 68. A sound's intensity
  32. 70. the tightening of a muscle
  33. 72. Blood vessels that carry blood away from the heart
  34. 74. variety
  35. 75. Bacterial infection of the lungs
  36. 76. Age The age of a rock compared to the ages of rock layers
Down
  1. 1. Takes in and retains energy
  2. 2. A collection of tissues that carry out a specialized function of the body parent cell original cell before cell division
  3. 3. A diagram that shows the occurrence of a genetic trait in several generations of a family.
  4. 6. Upper chamber of the heart
  5. 7. A place where two or more bones meet
  6. 9. Muscles attach to bones to help provide movement
  7. 10. Damage to the brain from interruption of its blood supply.
  8. 11. The shaking that results from the movement of rock beneath Earth's surface.
  9. 14. (Bends) light rays so the rays focus on the retina
  10. 15. An organism's physical appearance or visible traits.
  11. 20. an organism that contains two different alleles for a trait (Aa)
  12. 21. Record The millions of fossils that scientists have collected
  13. 24. The opening through which light enters the eye
  14. 25. A living thing that is not a human being or plant
  15. 26. Darwin English natural scientist who formulated a theory of evolution by natural selection (1809-1882)
  16. 29. Male part of the flower
  17. 31. Microscopic blood vessels that connect arteries and veins
  18. 32. Cell division that produces reproductive cells in sexually reproducing organisms
  19. 33. pivot point of a lever
  20. 34. Lower chambers of the heart
  21. 35. High blood pressure
  22. 39. The principle that in undisturbed rock layers the oldest rocks are on the bottom
  23. 41. genetic makeup of an organism
  24. 43. Attaches muscle to bone
  25. 44. A plant that produces seeds that are exposed rather than seeds enclosed in fruits
  26. 45. Powerhouse of the cell
  27. 46. Straightening a body part
  28. 47. Ability of an animal to look like another more harmful animal
  29. 50. Atoms of the same element that have different numbers of neutrons
  30. 52. Light sensitive layer of the eye; contains rods and cones
  31. 53. THE STUDY OF EMBRYOS
  32. 56. dominance Situation in which one allele is not completely dominant over another allele
  33. 57. Compound
  34. 59. A term that typically describes a species that no longer has any known living individuals.
  35. 61. A person who studies plants and animals by observing them
  36. 64. Material through which a wave travels
  37. 66. layer
  38. 67. Passes on from one place to another
  39. 69. sticky portion at the top of the style where pollen grains frequently land
  40. 71. unicellular fungi
  41. 73. How high or low a sound is
  42. 77. A reflected sound wave