Top 100 Questions

  1. I would like to know if the aluminum in antiperspirants... (more)
  2. Why do brown or blue eyes turn green in young adulthood? (more)
  3. Are Sedna and Quaoar two new planets? (more)
  4. In the book Cat's Cradle by Kurt Vonnegut, Jr., there is a... (more)
  5. Is it true that in total a bee's venom is acidic while a wasp's... (more)
  6. Which substance plays the most important role in making a blue... (more)
  7. What is an aluminum lake? Does it contain aluminum? (more)
  8. How can we re-magnetize old magnets when they've lost their... (more)
  9. How does an analog ammeter works and how could I make one? (more)
  10. What is the amount of force in foot pounds behind the average... (more)
  11. Is there a way to make a simple smoke bomb that isn't poisonous... (more)
  12. At a bar a fellow was doing a bar trick in which he asked anyone... (more)
  13. I know that the genes for red hair and for blonde hair are both... (more)
  14. How many satellites orbit the earth? How many are used for... (more)
  15. I would really appreciate it if someone could help me make sense... (more)
  16. How much liquid is in the stomach? (more)
  17. Is water from a dehumidifier de-ionized? The owner's manual for... (more)
  18. Do you know of any analysis or test data available to show that... (more)
  19. Is the line spectrum that is produced by a fluorescent tube the... (more)
  20. Who REALLY discovered oxygen? According to an National Public... (more)
  21. How many active volcanoes are there at any onetime on the Earth,... (more)
  22. I am interested in the transmission of RF through different... (more)
  23. How long would it take for the Earth to freeze if the Sun burnt... (more)
  24. What is the efficiency of a typical jet engine? i.e. how much of... (more)
  25. In my science 9 class we recently had a discussion about... (more)
  26. If Entamoeba Coli is present in the human intestine can other... (more)
  27. Is it possible for a wild koala bear to ignite as a result of... (more)

  28. Why does an ice cube melt faster in tap water than salt water? (more)
  29. Does water affect a magnet's strength? Do magnets lose their... (more)
  30. When seperating hydrogen and oxygen from water by using... (more)
  31. Why does lemon prevent the browning of apples? When browning of... (more)
  32. My question is about the reproduction of the Moon Snail... (more)
  33. Are Canadian dimes made out of zinc? What about quarters,... (more)

  34. I have spent 4-5 hrs. attempting to magnetize some iron (Fe)... (more)
  35. I have blue eyes and am the mother of a son who has blue eyes as... (more)
  36. How much heat energy (watts) is released from the human body? Is... (more)
  37. Why is the sound of fingernails scratching against a chalkboard... (more)
  38. My son, age 12 is asking for a chemistry set for Christmas. This... (more)
  39. What is your personal view of global warming? Do you believe... (more)
  40. How does dish soap work to clean dishes? (more)
  41. (more)

  42. We have an older pop machine at work with canned soft drinks. ... (more)
  43. Approximately how many nuclear tests do the americans alone... (more)
  44. What does cytoplasm do in the cell? (more)
  45. How did scientists conclude that a major part of our genome is... (more)
  46. Why doesn't a neon sign finally "run out" of exited atoms and... (more)
  47. What is the effect of sound on plants? I have come up with a... (more)
  48. What must occur for two parents with blood type AB to have a... (more)
  49. Are we the center of the Universe? Does it always appear to an... (more)
  50. I have a small laser pointer. The spot produced by the beam is... (more)
  51. Why does phenolphthalein turn pink with a base? I know it has... (more)
  52. I am curious. What if two magnetic field lines were to intersect... (more)
  53. Since the Big Bang we see (with Hubert Reeves and other... (more)
  54. Electricity. It powers almost all household appliances as well... (more)
  55. How long is a frogs tongue? I had a test question that I... (more)
  56. Why can't an insect grow large enough to terrorize a city? (more)
  57. Why does a balloon travelling inside a car seem to violate... (more)
  58. Why does a digital camera need a shutter- I think it should be... (more)
  59. What do paper and plastic bags degrade to? How much does it cost... (more)
  60. Does a person get their blood from both parents or just one? My... (more)
  61. I heard... (more)

  62. Can you really grow plants from the seeds found in Mammoth... (more)
  63. How long can someone sustain without sleep? What factors would... (more)
  64. I have conducted an experiment with a parachute. I was... (more)
  65. What are the urgent steps an undergrad must take to start... (more)
  66. What is "time"? Does the word "time" in Physics have the same... (more)
  67. I would like to know the amount of salt (either in ppm or %) in... (more)
  68. If matter expands when heated, and contracts when cooled, why... (more)
  69. I hear there are 9 species of cicadas in Canada, but I haven't... (more)
  70. Are double yolked eggs ever viable? Can they be fertilized? If... (more)
  71. If you find a bone in an archeological dig how can u tell what... (more)
  72. What causes a titanium headed golf club to spark when striking a... (more)
  73. Why are a duck's feet coloured orange? (more)
  74. What is inside an atom? In between the electrons and the... (more)
  75. When does your skull reach its full, adult size? (more)
  76. Does the temperature of a magnet affect its strength? (more)
  77. I was wondering where I can find good resources on determining... (more)
  78. What are water's special qualities, and how do they work? (more)
  79. What is sugar? (more)
  80. In my youth, I heard a story about an experiment: you compress a... (more)
  81. Why does vitamin C not work as well if it has been heated? I... (more)
  82. My question: How will they produce plastics, tires, roads or... (more)
  83. How can I construct a simple laser beam? (more)
  84. If I knew the centre of the universe and began to travel toward... (more)
  85. If the sun is a heat source, and as the sun gets closer to the... (more)
  86. Is homosexuality inborn? (more)
  87. Does a magnetic and/or electric field have an affect on... (more)
  88. I do not know if this might relate to Global Warming, but I... (more)
  89. If splitting the atom can create a huge amount of energy, then... (more)
  90. Why does it take nerves so long to grow back, more than for skin... (more)
  91. What happens when you use ethanol (unblended) in a standard,... (more)
  92. I am a year 5 teacher. I was wondering if it would be ok if I... (more)
  93. If Pluto is not a planet, how is it classified? What is it... (more)

  94. What is the significance of Science in our society? (more)
  95. I understand that cancer is caused by mutations in some of... (more)

  96. I understand the concept of dominant and recessive alleles but I... (more)
  97. How do astronomers know the true position of stars? When... (more)
  98. I'm doing a science project in which I'm trying to see if sound... (more)
  99. What process does a jellyfish go through when it stings... (more)
  100. What are some recent Canadian contributions to research and... (more)