Q&A - PSLE Science

[tinasen]

From a revision book.

I also think the correct answer is a)
Thanks Nebbermind.

[Nebbermind]

for science, it’s always better to stick to the one the school prescribed. The qns in some of the easily available revision bks can be very confusing…not a good thing to attempt when so close to the PSLE.

[smartmummy]

Pls help me.

Is ceramic man-made?

[Sun_2010]

Ceramic is man made.

It may be made from clay (natural material) but it is man made

[smartmummy]

Sun_2010:

Ceramic is man made.

It may be made from clay (natural material) but it is man made

thank you Sun_2010!.

[smartmummy]

i have a qn.

Is it correct to say that the stress ball can be compressed?Explain ur answer.

pls help me answer the qn.thank you.

[simple88]

Hi,


I’m new to the forum discussion but I have been reading and picking up a lot of useful information here. Have a P4 question from my DD which my P6 DS also does not know. I hope to get some advice here.

Nanyang 2010 SA2 P4 Q23
Kharil conducted an experiment to find out how the colour of a material affects the amount of heat absorbed by the cloth. He placed two similar blocks of ice in the basketball court and covered them with cloths of different colours. Cloth A is pink and cloth B is dark red.

Which one of the following statements is a likely hypothesis for the experiment?
1) The block of ice covered by cloth B will melt first.
2) The block of ice will melt because of heat from the sun.
3) Both blocks of ice will absorb heat from the surroundings.
4) Cloth B will release more coldness to the surroundings.

The answer key is (3) but I thought should be (1).
The definition of Hypothesis I gathered from Science PSLE Guide Book is what you predict the results of an experiment will be.

Can someone help to enlighten me? Thanks!

[Chenonceau]

simple88:

Hi,


I'm new to the forum discussion but I have been reading and picking up a lot of useful information here. Have a P4 question from my DD which my P6 DS also does not know. I hope to get some advice here.

Nanyang 2010 SA2 P4 Q23
Kharil conducted an experiment to find out how the colour of a material affects the amount of heat absorbed by the cloth. He placed two similar blocks of ice in the basketball court and covered them with cloths of different colours. Cloth A is pink and cloth B is dark red.

Which one of the following statements is a likely hypothesis for the experiment?
1) The block of ice covered by cloth B will melt first.
2) The block of ice will melt because of heat from the sun.
3) Both blocks of ice will absorb heat from the surroundings.
4) Cloth B will release more coldness to the surroundings.

The answer key is (3) but I thought should be (1).
The definition of Hypothesis I gathered from Science PSLE Guide Book is what you predict the results of an experiment will be.

Can someone help to enlighten me? Thanks!

A hypothesis describes an observable result you predict for the experiment. Only (1) is observable. You can't observe \"because of heat from the sun\". This is an explanation for why ice melts, not an event you can see.

You can't observe that the \"blocks of ice will absorb heat\". Again, this is an explanation for why ice melts, not an event you can see.

You also can't observe Cloth B releasing more coldness.

You CAN observe which block of ice melts first as described by Statement (1).

[simple88]

Thanks alot! That should clear my doubts.

[MadScientist]

I’d go for 1) as well… the basis (defines parameters) of conducting the experiment was about colour absorbtion of heat. That qualifies 1) to be the answer. 3) is the actual event that would happen… but not the aim of the experiment nor the observed parameter.