Q&A - PSLE Science

[verxs]

atutor2001:

[quote]....

This however, is NOT true for PSLE questions. It is true that the subject matter in the question may not be in the Science Syllabus (e.g concepts of Centre of Gravity, laws of buoyancy, newton's law of motion, etc) but these knowledge of the concepts are given in the question itself. .......

Students who are weak in English usually \"died\" in such question. It is near impossible for them to comprehend the information given not because of their lack of processing skill, but their inadequacy in English.[/quote]I used to believe that too but many foreigners with similar problems in language do not display problems answering these questions. I'm sure there's a way around it. Similar to how some students have problems with language but still excel in problem sums in maths.

[verxs]

Singlish?! haha…it might probably help some of them!

[atutor2001]

verxs:

.....


I used to believe that too but many foreigners with similar problems in language do not display problems answering these questions. I'm sure there's a way around it. Similar to how some students have problems with language but still excel in problem sums in maths.

My impression of foreign students are :

1. very hard working
2. memorises dictionary
3. can comprehend well
4. difficulty in expressing in writing or verbally

On the other hand, local kids are simply bo chiap. Immediate reaction when they faced such question. : \"Dou no what they are talking about?\"

[verxs]

That is true too. So does this mean the real problem is the state of mind of our local children? Too pampered?

[atutor2001]

verxs:

That is true too. So does this mean the real problem is the state of mind of our local children? Too pampered?

Fully agreed. I have 10 over nephews & nieces of around the same age. Only 3 make it to JC. They are all intelligent kids but only interested in playing, boy friend/girl friend issues, chasing idols......

[naggo-nitemare]

Ler:

tianzhu:

[quote=\"naggo-nitemare\"]
Qn 15: Answer should be (2). \"Flower is beautiful\" is not a Science concept. \"Anther is shorter than stigma\" is to prevent cross pollination

Qn 17: Answer should be (2). Longer rubber band will make it travel shorter distance. Bigger plastic roller has bigger circumference so it can travel further.

Qn 18: Answer should be (2)

Qn 21: Answer should be (2). If S1 and S2 are closed, short circuit will occur.

[/quote]Hi everyone. V paiseh for error.
Q15 - explanation should be \"Anther is shorter than stigma\" to prevent SELF pollination.

Tks

[youngtay]

Hi, pls help


For the question from SCGS SA2, question 16, the answer is 4, question 10, answer is 4 and question 13 answer is 1. can explain to me why? (Sorry I don’t know how to add link.)

TIA

[tianzhu]

youngtay:

Hi, pls help


For the question from SCGS SA2, question 16, the answer is 4, question 10, answer is 4 and question 13 answer is 1. can explain to me why? (Sorry I don't know how to add link.)

TIA

Hi

To make it easier for members to answer your questions, here's the link

http://www.orlesson.org/orp/09Sc/2009-Sc-SA2-SCGS.pdf

Best wishes

[tianzhu]

Hi


In answering Q16, may I suggest you have a recap on the topic of heat by reading your textbook and the PSLE Science Guide (MC).

Good conductors of heat allow heat to travel through them easily. Materials which do not conduct heat well are known as poor conductors of heat.

The cloth wrapped around Material P is scorched.

This is because heat is conducted away quickly from the cloth by Material Q and the cloth never gets hot enough to burn.

Material P is a poor conductor of heat and Material Q is a good conductor of heat.Hence (4) is correct.

Best wishes

[tianzhu]

Hi


Q13 tests students on the concept of a fair test.

For an experiment to be a fair test, you should change only the variable you are testing. All the other variables should be kept the same. Only one variable should be changed at a time.

In this question, you are finding out whether the colour or the type of surface affects the amount of heat absorbed by an object.

Therefore the variables you should change one at a time are the colour and type of surface of an object. Everything else such as materials, sizes must be the same.

Hence (1) is the correct answer.

Best wishes