2018 PSLE Discussions & Strategies (Born in 2006)

[puff]

ski:

Should be B Only.


X and Y can be different or same materials e.g. both can be iron or X can be iron and Y is glass. There is no way to ascertain. But Z and Y must be different materials e.g. Z is wood, Y is iron.

Could Z and Y made up of different type of wood?

[Mum of 3]

lee_yl:

ski:

Should be B Only.


X and Y can be different or same materials e.g. both can be iron or X can be iron and Y is glass. There is no way to ascertain. But Z and Y must be different materials e.g. Z is wood, Y is iron.

Thanks. That’s what my girl thought too but her friend put neither. Reason being that the materials Y and Z could have different masses.

It was not mentioned that the 3 solids are identical nor it is of fair experiment.

Did the question state if X, Y and Z are of the same size?

[faithj]

I think it is 4.

eg. Y and Z could both be made of wood, but Z could be hollow.

[ski]

faithj:

I think it is 4.

eg. Y and Z could both be made of wood, but Z could be hollow.

Btw, wood does not sink

[puff]

ski:

faithj:

I think it is 4.

eg. Y and Z could both be made of wood, but Z could be hollow.

Btw, wood does not sink

Some wood sink eg cocobolo Ebony
There is a youtube video

[Usepaper]

Is there any moderation for subject grade? Or it must be above 90 to get an A*? Any info from moe website? As I heard it is strictly base on raw score…no moderation at all regardless of the difficulty of paper

[lee_yl]

Mum of 3:

lee_yl:

[quote=\"ski\"]Should be B Only.


X and Y can be different or same materials e.g. both can be iron or X can be iron and Y is glass. There is no way to ascertain. But Z and Y must be different materials e.g. Z is wood, Y is iron.

Thanks. That’s what my girl thought too but her friend put neither. Reason being that the materials Y and Z could have different masses.

It was not mentioned that the 3 solids are identical nor it is of fair experiment.

Did the question state if X, Y and Z are of the same size?[/quote]No leh. Girl said the three spheres “looked” identical. She finds the question a bit ambiguous.

[faithj]

ski:

faithj:

I think it is 4.

eg. Y and Z could both be made of wood, but Z could be hollow.

Btw, wood does not sink

Depends on the density. Not all wood are less dense than water. Anyway its just an example, assuming its testing on 'materials'. But I think the main clue here the 2 statements didn't mention a difference in mass, despite being identical in size and material.

[lee_yl]

janet88:

hi lee yl,

your daughter's psle is OVER! now you can relax.

Hi Janet,
Just saw your post. One more paper to go tmrr. But DD2’s easily distracted the whole day. Told her she can go and sleep only after 10.30pm. 30 mins more and I will be liberated!!!

[Sctc]

lee_yl:

https://i.postimg.cc/zBsVqFj5/93963_FA5-3_C01-454_A-88_DC-_ECD89514047_D.jpg\">


There was one question that my girl and her friend got different answers. The MCQ question was about three solids X, Y, Z.

Two statements were given:
A. The material making solids X and Y is the same
B. The materials making Y and Z were different

Which of the statement(s) could be concluded from the above experiment?

1). Both A and B
2). B only
3). A only
4). Neither A nor B

Is A the mass of X and Y not the material. If I remember the question correctly. I may be wrong.