"Wow."
Chem NQE's were fun. The only letdown is that I can't take the booklet with me, because the booklet is the answer sheet thing for the extended thing. I finished all I could somewhere in the middle of recess, which is okay, considering I haven't learnt anything from the Chem tutorial sessions I haven't been to. Which is fine, because the NQE was easier than the Physics one (in my dishonest opinion anyway) and I did manage to finish maybe 5/8ths of it. Including a question on dipeptides, which was fun. Seriously, it's just adding up atomic weights, rounding and a little bit of logic.
The rest of it, I couldn't do, which was on reactions with a molecule or some kind of compound with a reactant, and drawing diagrams, etc. etc. The multiple choice was okay too.
Rio Tinto was a let-down because it was so easy, and yet so stupid. If I do get any wrong, it's not that I got it wrong that takes the cake, it's because I can't prove why my answer is correct and theirs isn't. It's like they want us to think like old geezers sitting round a coffee table, writing this up. Stupid, really.
For instance, the question on the conversion of "sound to nerve impulses". You have:
A) Ear Canal
B) Ear Drum
C) Cochlea
D) Auditory Nerve
(Probably not in the same order, but those were the choices.)
Now, Ear Canal is just a tube, Ear Drum is a membrane which acts as a microphone/reverse speaker, Cochlea is an organ with cilia (?) and fluid for conducting vibrations and conversion of those vibrations to "nerve impulses" and the Auditory Nerve is another tunnel from the Cochlea to the Brain, carrying a "nerve impulse" and not a pressure wave this time. (Could this paragraph be all wrong?)
So, if it's not A or D, then B is converting "sound" to vibrations, which I wouldn't call "nerve impulses" because they travel through bone to the Cochlea. The Cochlea technically and by extension transforms "sound" into "nerve impulses", but that's not what it's function is. So, either way, it does seem you can't have a "right" answer. And if this were an extended response, I'd be much, much more content.
Hoping I get over it. Eventually.
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8 comments:
the most correct answer
I put cochlea because it sounded the most credible
Sound is vibrations. Cochlea changes vibrations to nerve signals. Therefore Cochlea changes sound to nerve signals. It makes perfect sense.
Nooooooooo! Why did I put auditory nerve! DD:
uh, well, sound travels through the ear canal, and hits the ear drum. the ear drum vibrates a little more, sending vibrations through the cochlear. Now in the cochlear, fine cillia detect these vibrations and turns it into an electrical signal. this goes along the nerve to the brain.
so, yeah, nerve impulse = electrical signal. I nearly got this one wrong (brain bee)
But vibrations along..well..hmm...
what is sound? sound is vibration. what are vibrations? compressions and rarefactions.
^
Getting 5/8ths of that test would put you in the high zone already, because most people will only understand 20% of the MC...
Well, at least it made more sense than this year's Rio Tinto (for which I will not get a hat-trick in)
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