Q&A - PSLE Science

[G Tan]

YumYum:

Hi, I need help with this Qn.


if bulb B doesnt light up, will A and C still light up? answer key = 4.

thanks http://i41.tinypic.com/zkiyow.jpg\">

Yes ansqwer is 4. The bulb B serves as a n electrical conductor

[YumYum]

G Tan:

YumYum:

Hi, need help with this Qn:


answer key is 2. Why is B incorrect?

thanks http://i39.tinypic.com/2lm1kk6.jpg\">

Answer shd be 4 right?!

My ds chose answer as 4 but answer key is 2. So was wondering if answer shd be 4 or 2?

[G Tan]

YumYum:

G Tan:

[quote=\"YumYum\"]Hi, need help with this Qn:


answer key is 2. Why is B incorrect?

thanks http://i39.tinypic.com/2lm1kk6.jpg\">

Answer shd be 4 right?!

My ds chose answer as 4 but answer key is 2. So was wondering if answer shd be 4 or 2?[/quote]answer cant b 2. Someyime answer from school 's paper is wrong..

[annamom]

Hi G Tan


Chloroplasts are organelles found in plant cells and other eukaryotic organisms that conduct photosynthesis (from Wiki)
Statement B says Cell X is definitely a plant cell which is a false statement as it does not has chloroplasts…
Please explain why answer cannot be 2. Sorry I am just as confused and can you help by explaining why Cell X is definitely a plant cell?

Many thanks.

[YumYum]

Hi g tan n Annamom,


Went to check with tuition teacher n she came back yesterday to day that answer key 2 is correct, cos of word "definitely", n reason which Annamom mentioned.

Thanks

[G Tan]

YumYum:

Hi g tan n Annamom,


Went to check with tuition teacher n she came back yesterday to day that answer key 2 is correct, cos of word \"definitely\", n reason which Annamom mentioned.

Thanks

AT pri,ary school level, they are supposed to know tt with cell wall, it must be a plant cell. Also with chloroplast, a cell must be able to photosynthesise...

[annamom]

Hi G Tan & Yum Yum


Cell walls are found in plants, bacteria, fungi, algae, and some archaea (from Wiki)
The key word is "definitely", Cell X could have been a fungi cell.

Thank you.

[struggling]

Hi everyone



Just trying a poll here : do you think it's necessary to send your kids for tuition in science to be able to score well?

After the meet the parents session with the teacher after CA1, the teacher told me that the section B in science is all about knowing the ' key phrases and key words' to use in the open ended answers.

Where to find such things? Just do all the practice from past papers, or got to go to tuition for the answers.?

I really want to avoid the tuition track if I can. Help please, those with experience! :imdrowning:

Thanks in advance.

[Zack7]

struggling:

Hi everyone



Just trying a poll here : do you think it's necessary to send your kids for tuition in science to be able to score well?

After the meet the parents session with the teacher after CA1, the teacher told me that the section B in science is all about knowing the ' key phrases and key words' to use in the open ended answers.

Where to find such things? Just do all the practice from past papers, or got to go to tuition for the answers.?

I really want to avoid the tuition track if I can. Help please, those with experience! :imdrowning:

Thanks in advance.

speaking from personal experience, i never had tuition in primary school, about 10 years back now...

i don't know why the scene has evolved to such crazy standards...

something has to be done to curb this runaway paper chase.

also, science is on the surface, about key words and phrases....

but more important, it is about understanding what it means...

[Zack7]

YumYum:

Hi, I need help with this Qn.


if bulb B doesnt light up, will A and C still light up? answer key = 4.

thanks http://i41.tinypic.com/zkiyow.jpg\">

hmm why is there a circle around bulb B? is it something that you drew in or ?

anyway, ignoring the circle around B, the answer should be 3, none of the bulbs will light up.

because if B is faulty, and the circuit is connected in series, there will be no complete loop.

bulb B does not act as an electric conductor, because current cannot flow through its faulty filament. hence electrical flow ends at B.