Q&A - PSLE Science

[Vanilla Cake]

ms_lim:

Need help to explain for part (c) of this question :

http://i56.tinypic.com/148p2ec.jpg\">
Ans key : chemical potential engergy --> Kinetic energy + Sound energy
My dd's ans : Kinetic energy --> Heat sound + Sound energy

millan:

There is Chemical Potential Energy as the energy that is used to push the ball comes from the person pushing it, as Chemical potential energy = the energy stored inside our body, so the person who pushes the ball converts the CPE stored in his body -> KE -> SE (We can hear the sound when the ball hits the bowling ball down. If there is and extra box, put heat energy

Hope this helps

Nebbermind:

I don't agree with your answer. This is a 'force' qn, not an 'energy' qn. Is this from a asessment book or past yr ppr?

From Edgefield Primary School 2011 P6 Prelim Science set on 25 August 2011.

[andante]

Hi,

pls help on the following question as my dd thinks that there is no right answer given. TIA.
http://i54.tinypic.com/20iymhw.gif\">

[tisha]

Publica:

vidhyalog:

[quote=\"tisha\"]

This Q is from RGPS Q21 Prelim 2011.

The answer key says 1 (C only) as the answer. Could someone confirm this and explain why? :please:

My son said B&C. As we do not know how much water was there before the ruler was put in - we cannot find A.

Hi,
The answer should be C only. Since A was not fully submerged in the water, we cannot find the volume of B when both A and B are put into the beaker.[/quote]Thankyou Publica for the clear explaination.

[Alchemist]

Dear Andante and vidhyalog, my dd argue that there is no egg in plant but only ovule.[/quote]

Hi ms_lim,
Thx for your clarification. \"paiseh\", no wonder my dd insisted on the answer(2) i.e. ovule :)[/quote]


Hi - I got this from one of the text books. In the diagram - the ovule is shown to contain egg cell. Would appreciate if anyone else could help clarify. http://i53.tinypic.com/33f3odt.jpg\">

Thanks

[P.047330KH]

hi , can anyone advise on how to upload a picture of a science prelim 2011 paper ?

[tianzhu]

P.KH:

hi , can anyone advise on how to upload a picture of a science prelim 2011 paper ?

Hi

1) Do a print screen of the portion you want to upload.

2) Edit using Paint. Cut out the portion of the question you want to upload.

3) Save file in pictures

4) Go to Flickr (Free sign up as member) or other storage sites. Upload file. Select biggest/medium size. Right click to copy URL of image.

5) Coming back to Kiasuparents forum, click insert image button.

Best wishes

[ms_lim]

Can someone help to explain this question :

http://i53.tinypic.com/5b2v84.jpg\">
Ans key : (2), dd's ans : (3)

[ms_lim]

I have few other questions whereby dd's ans is different from ans key. Please help to explain :

http://i52.tinypic.com/2ibj7zp.jpg\">
Ans key : (2), dd's ans : (1) and (2)

[Alchemist]

Hi - Would appreciate help for this question. http://i52.tinypic.com/2e2mq1x.jpg\">

[ms_lim]

http://i55.tinypic.com/10idimx.jpg\">

Ans key : (2), dd's ans : (3)