2011 PSLE Discussions and Strategy

[tisha]

Ms tay:

tisha:

This Q is from Pei Chun Prelim 2011, it is Q18.
Need help with the correct answer. The ans key( by Jeremy) says 3. But DS says the answer is 1. :?

Hi tisha,

The answer is 3, cuz after a week, the iron should have rusted when it reacted with the condensed water vapour and oxygen in the tube. As we know, rusting is oxidization and oxidization 'absorbs' the oxygen in the tube. Thus, the amount of air in the tube will be reduced slightly, allowing more space for the water to fill in, resulting in a rise in water level in the tube. However, this contradicts the theory that water level is always equal, but the reason that the water level is not equal and the water level in the tube is higher than the water level in the basin becuz when the air in the tube is reduced, air pressure in the tube will decrease, so the outside air will push the water into the tube from the basin to equalize the air pressure. Besides, 21% of atmospheric air is oxygen, so the water level should increase by roughly 21%, and option 3 depicts this happening. Wish my answers is helpful...

Thank You Ms tay for ur detailed explaination. Will explain the same to DS.

[Ms tay]

U r always welcome tisha

[Vanilla Cake]

Tinkerbelle:

Hi Vanilla Cake,

Thanks for informing about the MGS English prelim being available online. I have yet to see the paper. I'm not an expert in English but if there's any particular questions you are interested in, I'll try my best to assist.

Hi Tinkerbelle,
MGS P6 Prelim English Paper 2 is available http://mwtuition.com.sg/free-resources. The following answers are worked out by my younger sister and pls help to check her answers. Appreciate your time and effort in this request. 感谢您的帮忙,再次谢谢您.

Q1 - 1
Q2 - 4
Q3 - 3
Q4 - 4
Q5 - 2
Q6 - 3
Q7 - 3
Q8 - 3
Q9 - 3
Q10 - 2
Q11 - 3
Q12 - 1
Q13 - 1
Q14 - 3
Q15 - 4
Q16 - 1
Q17 - 1
Q18 - 1
Q19 - 2
Q20 - 2
Q21 - 1
Q22 - 2
Q23 - 3
Q24 - 3
Q25 - 2
Q26 - 1
Q27 - 1
Q28 - 2
Q29 - 2
Q30 - 4
Q31 - L
Q32 - A
Q33 - H
Q34 - K
Q35 - B
Q36 - C
Q37 - M
Q38 - F
Q39 - G
Q40 - N
Q41 - is
Q42 - course
Q43 - overthrown
Q44 - transformation
Q45 - development
Q46 - flexibility
Q47 - symbols
Q48 - on
Q49 - professional
Q50 - literacy
Q51 - shown
Q52 - consuming
Q53 - products
Q54 - organised
Q55 - results
Q56 - age
Q57 - participating
Q58 - amount
Q59 - above
Q60 - dangerous
Q61 - carried
Q62 - is
Q63 - involved
Q64 - parents
Q65 - to
Q66 - Sarah prefers studying law to medicine.
Q67 - The police was able to open the door with a forceful kick.
Q68 - She was coerced to tell the truth despite her resistance.
Q69 - Without speaking Mandarin often, you will not be fluent in it.
Q70 - Every dress sewed by Siti for her children is painstaking.

[Herbie]

can someone help to put up the qn and pcture for pg 43 of 50 rgps prelim paper. Cos we have one missing page.

Many thanks

[tisha]

Herbie:

can someone help to put up the qn and pcture for pg 43 of 50 rgps prelim paper. Cos we have one missing page.

Many thanks

Which subject?

[gentledove]

Hi,


Can someone share the answer key for 2011 Raffles Girl prelim math paper, please?

TIA

[Herbie]

for science,

[tisha]

Herbie:

can someone help to put up the qn and pcture for pg 43 of 50 rgps prelim paper. Cos we have one missing page.

Many thanks

Oh, just checked my set, mine also missing.

2011 RGPS Prelim Science missing page 43 of 50, any RGPS parents pls help to upload. :please: Thanks.

[ngbrdad]

Btw is the answer provided for RGPS MCQ question 21 correct ?

[ngbrdad]

htn:

need help, ACS prelim science booklet A,q 19, ans is 1 and

q 27, ans is 2,can help to explain?

TIA

Answer for 27 is the best available answer among the 4 give.

For question 19. I'm not sure 1 is the correct answer cos it still look like a closed circuit to me.
Anybody wants to comment ?
Thanks.