Q&A - P4 Science

[usaik]

Hi,

Below is a question from one of the past year exam paper.
The answer provided is (1) D only.
http://i52.tinypic.com/34es178.jpg\">

I would like to check : Is the part which I have circled in red above not a leaf? And if is is a leaf, then shouldn't the answer be (2) instead of (1)?

Would appreciate some clarification into the above please. Thank you.

[Niedino]

usaik:

Hi,

Below is a question from one of the past year exam paper.
The answer provided is (1) D only.
http://i52.tinypic.com/34es178.jpg\">

I would like to check : Is the part which I have circled in red above not a leaf? And if is is a leaf, then shouldn't the answer be (2) instead of (1)?

Would appreciate some clarification into the above please. Thank you.

Hi usaik,

Yes, the part you circled is the leaf. However, as you can see in the diagram, it has not fully emerged and grown fully, hence, it is unable to photosynthesize. At that stage, the plant is still using food stored in the seed leaf to germinate. Hence, (1) D only is the correct answer.

Hope it helps!

Niedino

[Niedino]

zinc6539:

This is a question from Nan Hua Primary School CA2 2010 P4 Science. It's shown as question 9 on this website: http://www.oldschool.com.sg/index.php/module/PublicAccess/action/Wrapper/sid/9595afb87c8cf767f034c3ae53e74bae/coll_id/7288/recs_ppg/5/desc/Continual+Assessment+2+%28%232%29%3A+Section+B/pg_id/2


I hope to get some clarifications on the answer given. (a) Why did the plastic ruler gain heat when the question only states that Mary heated the iron ring. (b) & (c) Could there be an alternative answer that the ruler gets stuck in the ring, but did not break, since plastic ruler is slightly flexible?

Hi zinc6539,

For (a), the ruler will gain heat from the iron ring due to conductivity.

For (b) & (c), Yes, it is possible, and I would assume that if your child had written such an answer and explained the flexibility of the ruler, your child would have gotten at least a partial mark.

Hope it helps!

Niedino

[usaik]

Niedino:

Hi usaik,

Yes, the part you circled is the leaf. However, as you can see in the diagram, it has not fully emerged and grown fully, hence, it is unable to photosynthesize. At that stage, the plant is still using food stored in the seed leaf to germinate. Hence, (1) D only is the correct answer.

Hope it helps!

Niedino

Hi Niedino,
It certainly helps. Thank you so much!

[smartmummy]

http://i53.tinypic.com/ztwvo7.jpg\">

Hi all pls help me.
My son's answer for (b) was
substance Q has a definite shape but p doesnot.

How to answer for this qn?

[smartmummy]

http://i54.tinypic.com/207vud3.jpg\"> http://i56.tinypic.com/152by8j.jpg\">


i took two pictures cos of clearness.Thanks

[Niedino]

smartmummy:

http://i54.tinypic.com/207vud3.jpg\"> http://i56.tinypic.com/152by8j.jpg\">


i took two pictures cos of clearness.Thanks

Hi smartmummy,

I would say that your child needed to add in these words to get the full marks 'Substance Q ... does not have a definite shape' To do well for the Science exams, you need to convince your child to give the full answer. One common weakness is a false sense of security, where a child thinks that his/her answer is adequate when it is not. Remind your child to imagine that the marker does not know the answer and it is his job to explain clearly.

Hope it helps!

Niedino

[smartmummy]

Thanks Niedino for ur tips and the answer.

[shirley.020816tamzil]

http://i54.tinypic.com/qyd2sp.jpg\">


Answer in the answer sheet is (3), can someone please advise why is that so? Thanks.

[peterch]

shirley.tamzil:

http://i54.tinypic.com/qyd2sp.jpg\">


Answer in the answer sheet is (3), can someone please advise why is that so? Thanks.

This process transporting oxygen and waste material such as co2 in blood thru heart which is circulatory system

CMIIW