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 does an analog ammeter works and how could I make one? (more)
  9. How can we re-magnetize old magnets when they've lost their... (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. How many satellites orbit the earth? How many are used for... (more)
  13. At a bar a fellow was doing a bar trick in which he asked anyone... (more)
  14. I would really appreciate it if someone could help me make sense... (more)
  15. I know that the genes for red hair and for blonde hair are both... (more)
  16. How much liquid is in the stomach? (more)
  17. Is the line spectrum that is produced by a fluorescent tube the... (more)
  18. Do you know of any analysis or test data available to show that... (more)
  19. Is water from a dehumidifier de-ionized? The owner's manual for... (more)
  20. Who REALLY discovered oxygen? According to an National Public... (more)
  21. How long would it take for the Earth to freeze if the Sun burnt... (more)
  22. How many active volcanoes are there at any onetime on the Earth,... (more)
  23. In my science 9 class we recently had a discussion about... (more)
  24. I am interested in the transmission of RF through different... (more)
  25. Why does an ice cube melt faster in tap water than salt water? (more)
  26. Why does lemon prevent the browning of apples? When browning of... (more)
  27. When seperating hydrogen and oxygen from water by using... (more)
  28. If Entamoeba Coli is present in the human intestine can other... (more)

  29. Are Canadian dimes made out of zinc? What about quarters,... (more)

  30. Is it possible for a wild koala bear to ignite as a result of... (more)

  31. What is the efficiency of a typical jet engine? i.e. how much of... (more)
  32. I have spent 4-5 hrs. attempting to magnetize some iron (Fe)... (more)

  33. (more)

  34. How much heat energy (watts) is released from the human body? Is... (more)
  35. Why is the sound of fingernails scratching against a chalkboard... (more)
  36. Does water affect a magnet's strength? Do magnets lose their... (more)
  37. I have blue eyes and am the mother of a son who has blue eyes as... (more)
  38. We have an older pop machine at work with canned soft drinks. ... (more)
  39. What is your personal view of global warming? Do you believe... (more)
  40. Approximately how many nuclear tests do the americans alone... (more)
  41. My son, age 12 is asking for a chemistry set for Christmas. This... (more)
  42. What does cytoplasm do in the cell? (more)
  43. I am curious. What if two magnetic field lines were to intersect... (more)
  44. I have a small laser pointer. The spot produced by the beam is... (more)
  45. Why does phenolphthalein turn pink with a base? I know it has... (more)
  46. Since the Big Bang we see (with Hubert Reeves and other... (more)
  47. Why does a digital camera need a shutter- I think it should be... (more)
  48. Are we the center of the Universe? Does it always appear to an... (more)
  49. What do paper and plastic bags degrade to? How much does it cost... (more)

  50. I heard... (more)

  51. Why can't an insect grow large enough to terrorize a city? (more)
  52. Why does a balloon travelling inside a car seem to violate... (more)
  53. My question is about the reproduction of the Moon Snail... (more)
  54. What is "time"? Does the word "time" in Physics have the same... (more)
  55. Electricity. It powers almost all household appliances as well... (more)
  56. I would like to know the amount of salt (either in ppm or %) in... (more)
  57. What are the urgent steps an undergrad must take to start... (more)
  58. I have conducted an experiment with a parachute. I was... (more)
  59. What is the effect of sound on plants? I have come up with a... (more)
  60. How long can someone sustain without sleep? What factors would... (more)
  61. I hear there are 9 species of cicadas in Canada, but I haven't... (more)
  62. How did scientists conclude that a major part of our genome is... (more)
  63. Can you really grow plants from the seeds found in Mammoth... (more)
  64. I was wondering where I can find good resources on determining... (more)
  65. What causes a titanium headed golf club to spark when striking a... (more)
  66. Are double yolked eggs ever viable? Can they be fertilized? If... (more)
  67. What are water's special qualities, and how do they work? (more)
  68. What is sugar? (more)
  69. What is inside an atom? In between the electrons and the... (more)
  70. I am a year 5 teacher. I was wondering if it would be ok if I... (more)
  71. If splitting the atom can create a huge amount of energy, then... (more)
  72. If I knew the centre of the universe and began to travel toward... (more)
  73. My question: How will they produce plastics, tires, roads or... (more)

  74. If Pluto is not a planet, how is it classified? What is it... (more)

  75. In my youth, I heard a story about an experiment: you compress a... (more)
  76. Why does it take nerves so long to grow back, more than for skin... (more)
  77. I do not know if this might relate to Global Warming, but I... (more)
  78. Why does vitamin C not work as well if it has been heated? I... (more)
  79. I understand the concept of dominant and recessive alleles but I... (more)
  80. What must occur for two parents with blood type AB to have a... (more)
  81. Is homosexuality inborn? (more)
  82. If the sun is a heat source, and as the sun gets closer to the... (more)
  83. When does your skull reach its full, adult size? (more)
  84. Ethanol is the focus of many tax dollars these days. It seems to... (more)
  85. How can I construct a simple laser beam? (more)
  86. Does a magnetic and/or electric field have an affect on... (more)
  87. I'm doing a science project in which I'm trying to see if sound... (more)
  88. What are some recent Canadian contributions to research and... (more)
  89. What is the significance of Science in our society? (more)
  90. How long is a frogs tongue? I had a test question that I... (more)
  91. How does dish soap work to clean dishes? (more)
  92. How many scientists does Canada have? (more)

  93. Can you verify the scientific validity of statements I've... (more)

  94. I understand that cancer is caused by mutations in some of... (more)

  95. Does the temperature of a magnet affect its strength? (more)
  96. How do astronomers know the true position of stars? When... (more)
  97. Why are soccer balls coloured black and white? I heard it has to... (more)
  98. This question relates to global warming. Recent science news... (more)
  99. Hi, I was just wondering, I wanted to get into the whole... (more)
  100. Why are a duck's feet coloured orange? (more)