Science Practical Test

Today i just had my science practical test and its very easy especially the station on electric circuits  but the oil one is quite tricky...

(i am talking about the oil one)Many people just do the question but never read instructions on the paper and as a result, many people find out about it that they are all wrong and they regret the whole thing...(they are wishing that they can go back in time to redo the paper...)

At first i also never read the instructions and pour all the oil and measure the weight of it. then when i finished the paper, i had nothing to do so i just go through the paper again and founded this passage...(its the instruction that many people miss it and ended up doing all questions wrong) i read it and was immediately froze for seconds by my horror... the last 2 minutes time to finish the paper(Mr wee said), i rush through the whole station about the oil one(another 'oil one')...

But don't worry, i finished in time and still had a little time more so i waste up the remaining time by sitting there doing nothing...(lucky i find out!)