2011 PSLE Discussions and Strategy

[manzst]

Ozone layer only absorbs/blocks the UV rays and does not affect the heat coming into earth

Direct rays(or UV rays) is not heat
So the sun's heat will get directly into earth but the UV rays will be partially get into earth

PsleStudent:

ProteX:

[quote=\"PsleStudent\"]The gas called ozone protects the earth from the direct rays from the sun by forming a layer in the atmosphere. If not this layer the heat of the sun will get to the earth directly. When this ozone layer is depleted through the action of some chemicals man has no shelter again from the ultraviolent rays of the sun which can cause sunburn and skin cancer. There are also other negative effects of this ray from the sun.

But is the ozone layer completely depleted? If not, then the sun won't directly heat the Earth, right?

hmm... As for that i think for that, your opinion should be correct. As i think the ozone layer is not COMPLETELY depleted,there will still be a shelter but i think there would be more UV rays passing through the ozone layer? i am also not so sure about that... [/quote]

[Helping--Hand]

SOS

What is widow’s peak?

[manzst]

Helping--Hand:

SOS

What is widow's peak?

http://en.wikipedia.org/wiki/Widow%27s_peak

[elaine.035446tohky]

Seem like all mummies of top performer. Anyone know what will be T score for student with all Bs?

[Ms tay]

Helping--Hand:

Ms tay:

Science is my ds best subject he usually score 95 marks or above

But he only scored 89 marks for p6 preliminary
I Hope he can hit his record ...I know I have become
Very greedy now but 人心不足蛇吞象嘛 pls forgive me .

You must be very proud of your DS. ^^
don't demand more, just get the score that he could achieve the best.!!

Don't worry, my ds does not know that I expect that of him as
He is already so stressful, so I did not add burden to him
I hv told him that as long as he has done his best I do not mind
what score he will get
Two / one more paper/ papers to go. all the best to all Ds and DD :rahrah: :rahrah:

[Pen88n]

elaine.tohky:

Seem like all mummies of top performer. Anyone know what will be T score for student with all Bs?

Formula for T-score: T-score for subject = 50+10*((raw score - mean)/standard deviation)

The T-score for any subject is dependent on the mean and the standard deviation of the cohort for that subject. It is practically impossible to pin-point a T-score for all Bs as it is dependent on the standard of the paper and the performance of the cohort.

Take the case of an easy paper, \"B\" can mean a very low T-score for that subject if the mean and standard deviation is centering around \"A\" (possibly below 50). In the case of a difficult paper, \"B\" can mean a better T-score for the subject if the mean and standard deviation is centering around \"C\".

Hope this gives you some clarification.

[Helping--Hand]

Hi Ms Tay,

your DS top student?

[Tannymum]

NTL Hindi Paper 2 was tough.

[Ms tay]

Helping--Hand:

Hi Ms Tay,

your DS top student?

Yes, he is top in his level but he is in neighborhood school

[elaine.035446tohky]

Thanks, pen88yn for the info.

Glad tomorrow is the paper for my son. Cheers !!