Q&A - PSLE Science

[ms_lim]

Please help to explain Qn #25 from Pei Chun 2011 Prelim, Ans key is 2 :


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[P5G]

Please help.


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TIA.

[P5G]

Please help.


http://i56.tinypic.com/16jj4mg.gif\">


TIA.

[P5G]

Please help.


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TIA.

[P5G]

Please help.


http://i54.tinypic.com/1ypw1v.gif\">


TIA.

[P5G]

Please help.


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TIA.

[P5G]

Please help.


http://i54.tinypic.com/e3ji0.gif\">

TIA.

[P5G]

P5G:

Please help.


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TIA.

Hi Auntie atutor,

My answer is (4) as I has assumed the time for D to be 13 min. Besides (3), is this also a possible answer? Your advice please.


TIA.

[atutor2001]

P5G:

P5G:

Please help.


http://i54.tinypic.com/2s0jrk3.gif\">

TIA.

Hi Auntie atutor,

My answer is (4) as I has assumed the time for D to be 13 min. Besides (3), is this also a possible answer? Your advice please.


TIA.

Hi P5G

You are correct and I am wrong. I forgot to take into account the size of the exposed surface area as shown in the picture. Great, you have keen observation skill.

[atutor2001]

P5G:

Please help.


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TIA.

My answer is (3) C where there is a slight decrease in the temperature caused by the opening of the oven door which the time actual baking started.