Q&A - P4 Science
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![](\"http://i49.tinypic.com/hrin46.jpg\")
http://i49.tinypic.com/hrin46.jpg\">
My DS doubt for (b) is
The mass of the Plasticine would remain the same.
The volume of the Plasticine would remain the same.
Are both the answers correct? Pl confirm.
Thx. -
verykiasumummy:
Have a doubt here...It stopped eating means....then did it die....Pl explain to me.... :?
hi PiscesLeo, i suppose answer is 4. it says 10 days to complete the whole cycle, so 2 weeks which is 14 days, they should have already completed 1 cycle and in the nymph stage of the next cycle. for nymph stage, it will be active and will be eating, since options 1 to 3 mention \"eating\", \"moulting\" and \"active\" and only option 4 mention \"not eating\", it should be incorrect. so ans should be 4.PiscesLeo:
![](\"http://i48.tinypic.com/2hrkgo7.jpg\")
SCGS 2010 SA1 Q9
Question 9) Mrs Gin asked her pupils to observe an insect with a 3 stage life cycle at home and record their observations daily. It will take approximately 10 days for the insect to complete one cycle from the egg stage. Which of the following pupil did not record her observations correctly?
For no 3. - Chui Imm / It ate and moulted / It was active and eating
Answer key is 3. Is that correct?
Thank you. -
Jamesbond:
Only \"The volume of the Plasticine remains the same.\" is acceptable because the conclusion must be drawn from the experiment. There was no measurement of the mass so we could not come to the conclusion that \"The mass of the Plasticine would remain the same\".
My DS doubt for (b) is
The mass of the Plasticine would remain the same.
The volume of the Plasticine would remain the same.
Are both the answers correct? Pl confirm.
Thx. -
atutor2001:
:thankyou:
Only \"The volume of the Plasticine remains the same.\" is acceptable because the conclusion must be drawn from the experiment. There was no measurement of the mass so we could not come to the conclusion that \"The mass of the Plasticine would remain the same\".Jamesbond:
My DS doubt for (b) is
The mass of the Plasticine would remain the same.
The volume of the Plasticine would remain the same.
Are both the answers correct? Pl confirm.
Thx. -
Jamesbond:
In my opinion, the objective of this question is to test the student's practical knowledge on \"the time needed before moulting can take place\", that is, an insect will not moult just 1 day after hatching. Moulting is to allow the insect to grow bigger because the skin does no grow. Therefore, the insect needs to feed for a number of days to grow first then followed by moulting. As such, option (3) which indicates that it moults 1 day after hatching is definitely wrong because an insect does not moult just 1 day after hatching. Therefore, (3) is the answer since they are asking for the information that is stated wrongly.[
Have a doubt here...It stopped eating means....then did it die....Pl explain to me.... :?PiscesLeo:
SCGS 2010 SA1 Q9
Question 9) Mrs Gin asked her pupils to observe an insect with a 3 stage life cycle at home and record their observations daily. It will take approximately 10 days for the insect to complete one cycle from the egg stage. Which of the following pupil did not record her observations correctly?
For no 3. - Chui Imm / It ate and moulted / It was active and eating
Answer key is 3. Is that correct?
Thank you.
The meaning of \"stop eating\" could mean that the adult is dying, already dead... but as long as it can happen, then the information can still be correct. -
atutor2001:
In my opinion, the objective of this question is to test the student's practical knowledge on \"the time needed before moulting can take place\", that is, an insect will not moult just 1 day after hatching. Moulting is to allow the insect to grow bigger because the skin does no grow. Therefore, the insect needs to feed for a number of days to grow first then followed by moulting. As such, option (3) which indicates that it moults 1 day after hatching is definitely wrong because an insect does not moult just 1 day after hatching. Therefore, (3) is the answer since they are asking for the information that is stated wrongly.
Have a doubt here...It stopped eating means....then did it die....Pl explain to me.... :?Jamesbond:
[[quote=\"PiscesLeo\"]
SCGS 2010 SA1 Q9
Question 9) Mrs Gin asked her pupils to observe an insect with a 3 stage life cycle at home and record their observations daily. It will take approximately 10 days for the insect to complete one cycle from the egg stage. Which of the following pupil did not record her observations correctly?
For no 3. - Chui Imm / It ate and moulted / It was active and eating
Answer key is 3. Is that correct?
Thank you.
The meaning of \"stop eating\" could mean that the adult is dying, already dead... but as long as it can happen, then the information can still be correct.[/quote] :thankyou: -
![](\"http://i48.tinypic.com/2ngakpf.jpg\")
Can somebody help to answer (a)
In a hot air balloon, we use a poor conductor...hence hot air cannot escape making it to rise and float in air...etc is the explanation we give. Here they say it is a metal cup which is a good conductor....so my ds is confused....
Pl help...Thx. -
Jamesbond:
This question is not testing on good/bad conductor of heat. The concept tested is \"hot air rises\" and will push anything upwards along the way.
Can somebody help to answer (a)
In a hot air balloon, we use a poor conductor...hence hot air cannot escape making it to rise and float in air...etc is the explanation we give. Here they say it is a metal cup which is a good conductor....so my ds is confused....
Pl help...Thx. -
atutor2001:
Thank you atutor2001...
This question is not testing on good/bad conductor of heat. The concept tested is \"hot air rises\" and will push anything upwards along the way.Jamesbond:
Can somebody help to answer (a)
In a hot air balloon, we use a poor conductor...hence hot air cannot escape making it to rise and float in air...etc is the explanation we give. Here they say it is a metal cup which is a good conductor....so my ds is confused....
Pl help...Thx.
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Is television and mobile phone an example of light source....Some books say yes and some say no....Which is correct? Pl help.... :imdrowning:
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