Q&A - PSLE Science

[verykiasumummy]

dd’s sci teacher call to say question is a little misleading, usually will only have option 1 or 2 and cannot have both… questions like this are questionable to sch teachers to bargain for marks for both ans 1 and 2 to be given marks…

[Nebbermind]

If connect to B and CCT doesn’t light up, then u also cannot get anything conclusive for A.

[verykiasumummy]

that’s why its questionable… if parents like us can argue our way, kids will be confused as to which one to choose too…

[charsen]

I would say that the question is badly set.

Cheers

[verykiasumummy]

charsen:

I would say that the question is badly set.

Cheers

yes definitely... if not we wouldnt have so many questionable points about it..

[jewelbox]

Hi, appreciate any help on this MCQ. Dont understand why ans is 2. Thanks. http://i46.tinypic.com/awtkzd.jpg\">

[verykiasumummy]

jewelbox:

Hi, appreciate any help on this MCQ. Dont understand why ans is 2. Thanks. http://i46.tinypic.com/awtkzd.jpg\">

hi,

C cannot be opaque, if opaque, the other shapes will not show, so option 1 and 3 already wrong. left 2 and 4.

since the smallest shadow is the rectangle inside, E must be opaque, so between 2 and 4, option 2 aluminium is opaque. and D must also be opaque to cast the round ring around E. so ans is 2.

[jewelbox]

Very kiasumummy, thanks for the explanation. You make it so easy to understand.:)

[Happygolucky]

Why can’t C be in the shape of a ring, middle portion cut out?

Size of D is smaller than the shadow of the ring formed.

[verykiasumummy]

Happygolucky:

Why can't C be in the shape of a ring, middle portion cut out?

Size of D is smaller than the shadow of the ring formed.

because it says cut out in different shapes, it did not say cut holes in it to make ring...

if C is hollow inside, yes option 1 could be the ans...