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 Forum Index >  Test Paper Related >  Primary 6 Matters
 2013 Prelims! P6 Science! CBS MCQ Q24
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By: geniuskids (offline)  Saturday, September 28 2013 @ 04:37 AM CDT (Read 2364 times)  

Hi there, pls refer to the attached question.

My answer is 2 (which we are taught in school)


Answer Key is (4).

Pls explain why its 4.

Thank you

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By: JessicaTan (offline)  Sunday, September 29 2013 @ 07:30 AM CDT  

Hello! I am from De La Salle Primary School and this was my Prelimary Exam Paper.
My teacher has said that they accepted both answers (2) and (4).
If I am not wrong, they accepted (4) as in the degree of 10 , the glass tube will contract,
thus pushing the red ink towards flask X. In a period of time , the heat in flask X will enter the
glass tube, and since heat travels upwards , it will move alone the glass tube, pushing the red
ink too.
I think this is the explanationSmile
My answer is also (2) in the examintion and it is also accepted.
Wish you all the best in your PSLE! Big Grin

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