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. At a bar a fellow was doing a bar trick in which he asked anyone... (more)
  13. How many satellites orbit the earth? How many are used for... (more)
  14. I know that the genes for red hair and for blonde hair are both... (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. Do you know of any analysis or test data available to show that... (more)
  18. Is the line spectrum that is produced by a fluorescent tube the... (more)
  19. Who REALLY discovered oxygen? According to an National Public... (more)
  20. How many active volcanoes are there at any onetime on the Earth,... (more)
  21. Is water from a dehumidifier de-ionized? The owner's manual for... (more)
  22. How long would it take for the Earth to freeze if the Sun burnt... (more)
  23. I am interested in the transmission of RF through different... (more)
  24. In my science 9 class we recently had a discussion about... (more)
  25. Why does an ice cube melt faster in tap water than salt water? (more)
  26. Is it possible for a wild koala bear to ignite as a result of... (more)

  27. If Entamoeba Coli is present in the human intestine can other... (more)
  28. Why does lemon prevent the browning of apples? When browning of... (more)
  29. When seperating hydrogen and oxygen from water by using... (more)
  30. Are Canadian dimes made out of zinc? What about quarters,... (more)

  31. My question is about the reproduction of the Moon Snail... (more)
  32. I have spent 4-5 hrs. attempting to magnetize some iron (Fe)... (more)
  33. What is the efficiency of a typical jet engine? i.e. how much of... (more)
  34. Does water affect a magnet's strength? Do magnets lose their... (more)
  35. I have blue eyes and am the mother of a son who has blue eyes as... (more)
  36. Why is the sound of fingernails scratching against a chalkboard... (more)
  37. How much heat energy (watts) is released from the human body? Is... (more)
  38. (more)

  39. My son, age 12 is asking for a chemistry set for Christmas. This... (more)
  40. What is your personal view of global warming? Do you believe... (more)
  41. We have an older pop machine at work with canned soft drinks. ... (more)
  42. How does dish soap work to clean dishes? (more)
  43. Approximately how many nuclear tests do the americans alone... (more)
  44. What does cytoplasm do in the cell? (more)
  45. I am curious. What if two magnetic field lines were to intersect... (more)
  46. I have a small laser pointer. The spot produced by the beam is... (more)
  47. Why does phenolphthalein turn pink with a base? I know it has... (more)
  48. Are we the center of the Universe? Does it always appear to an... (more)
  49. Since the Big Bang we see (with Hubert Reeves and other... (more)
  50. What is the effect of sound on plants? I have come up with a... (more)
  51. Why does a digital camera need a shutter- I think it should be... (more)
  52. Electricity. It powers almost all household appliances as well... (more)
  53. Why can't an insect grow large enough to terrorize a city? (more)
  54. What must occur for two parents with blood type AB to have a... (more)
  55. How did scientists conclude that a major part of our genome is... (more)
  56. Why does a balloon travelling inside a car seem to violate... (more)
  57. What do paper and plastic bags degrade to? How much does it cost... (more)
  58. I heard... (more)

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

  92. What happens when you use ethanol (unblended) in a standard,... (more)
  93. What is the significance of Science in our society? (more)
  94. I understand the concept of dominant and recessive alleles but I... (more)
  95. I understand that cancer is caused by mutations in some of... (more)

  96. How do astronomers know the true position of stars? When... (more)
  97. I'm doing a science project in which I'm trying to see if sound... (more)
  98. Ethanol is the focus of many tax dollars these days. It seems to... (more)
  99. What are some recent Canadian contributions to research and... (more)
  100. Can you verify the scientific validity of statements I've... (more)