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Misconceptions In Science

Discussion in 'Science' started by Apple101, Jul 7, 2016.

  1. gainly

    gainly Lead commenter

    I should have said 1.1 km away, as 2.2 km would be the diameter on this scale.

    You are of course quite right. The atomic diameter is the distance between adjacent nuclei and the electrons could indeed be anywhere. The term electron "orbitals" is I think confusing as it suggests it is similar to planets orbiting the sun. In fact the orbitals are mathematical functions which allow the probability of an electron being in a particular region to be calculated. For GCSE this would be too complicated for most students and the main thing is just to give some idea of the scale.
    border_walker likes this.
  2. cariadwch

    cariadwch Established commenter

    gainly likes this.
  3. Stiltskin

    Stiltskin Star commenter

    cariadwch likes this.
  4. gainly

    gainly Lead commenter

  5. djrfleet

    djrfleet New commenter

    ... defaecating is excretion ...
  6. border_walker

    border_walker Lead commenter

    Partly it is.
  7. BW12345

    BW12345 Star commenter

    I'm slightly troubled by some of the misconceptions teachers have, as revealed in this thread when correcting others!

    There are some nice refinements though;)
  8. Monikas72

    Monikas72 New commenter

    Plants respire only at night.
    Heavier objects fall faster.
    In order to go with steady speed the driving force (forward) needs to be larger that the drag forces.
  9. BW12345

    BW12345 Star commenter

    That's silly, plants only perspire in the daytime and they retire at night....
    phlogiston likes this.
  10. BW12345

    BW12345 Star commenter

    When you pass a beam of light through water, it accelerates when it comes out.

    Deionised water doesn't have any ions in it.

    If you jump out of an aeroplane, at the moment you open your parachute you shoot upwards.

    Rivers have memory

    Crystals have energy
  11. BW12345

    BW12345 Star commenter

    Girls have larger brains than boys
    Boys have smaller brains because they are more dense.

    You can look for a gas escape with no danger if you use a safety match.
    Turning the lights off is ok if there's a smell of gas, you just mustn't turn them on.
  12. blazer

    blazer Star commenter

    I had a head of science tell me that heavy objects fall faster! When I tried to put him straight he told me that as I was "only a chemist" he wasn't convinced. I later found out he was a PE teacher who somehow found himself HoS!
  13. gainly

    gainly Lead commenter

    Of course the problem is, air resistance means that often heavier objects actually do fall faster. I doubt if the PE teacher would understand the reason why.
    topquark and blazer like this.
  14. BCCHEM

    BCCHEM New commenter

    What about all men having beard? Does it mean after puberty boys go back to have ancestral gene! Obviously this is not true but to bring humour in the classroom can we say such things when the boys display their boisterous behaviour?
  15. gainly

    gainly Lead commenter

    A common misconception is that freezing kills bacteria. Some people have suggested that putting jeans in the freezer means there is no need to wash them.
  16. BW12345

    BW12345 Star commenter

    No silly, you put your jeans socks and underwear in the MICROWAVE so you don't have to wash them.

    Hot air from a coal fire expands as it goes up a chimney.
  17. gainly

    gainly Lead commenter

    Microwaving is an effective way of sterilising kitchen sponges, provided they are wet. Of course it is the heat that kills the bacteria not the microwaves.
  18. BW12345

    BW12345 Star commenter

    Yes. Must be good for sweaty undies then :)
  19. Stiltskin

    Stiltskin Star commenter

    I am guessing you meant to say the moon does have gravity. BTW it's better not to have music play automatically on your website, it is really obtrusive. There is a reason large companies don't do it (plus it made me have a flashback to the early millennium and MySpace pages)
  20. iGCSE101

    iGCSE101 New commenter

    fantastic thread! I saw in the first chapter of the GCSE chem book ( iGCSE) a 'did you know' section that explained the reason stained glass windows are thicker at the bottom was because glass was a liquid that flowed! I think a thread on misconceptions in the text books would also be a great idea here!

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