2011 PSLE Discussions and Strategy

[Mum of 3]

For Science Paper 2, there is an "energy" question - about an inflated balloon being placed on top of a toy car. Question has 2 parts: (a) why is it that the car can still move though the balloon is already deflated? (b) list 2 ways to make the car move faster.


What are the answers?

[ernestng1]

:? Hello >!@!%$! Ernest from Cat..

[papaya99]

hyperkiasuperson:

Anyone remember the answer for question 11, the one about the plant and human transport system in MCQ?

I put 2!!! its correct checked with others [/quote]

What is the question specifically?[/quote]

wat is 2? izzit A and C? :scratchhead:[/quote]

My ans is : (2) A & C right? Puzzled...

[papaya99]

Mum of 3:

For Science Paper 2, there is an \"energy\" question - about an inflated balloon being placed on top of a toy car. Question has 2 parts: (a) why is it that the car can still move though the balloon is already deflated? (b) list 2 ways to make the car move faster.


What are the answers?

My ans is : (a) when the air escaped from the balloon, the car gained kinetic energy and after the balloon was deflated, the car would still have some kinetic energy so it would move from point l to point m.
(b) apply lubricant on the surface of the ground and inflate the balloon more.

[chatterbox321]

papaya99:

Mum of 3:

For Science Paper 2, there is an \"energy\" question - about an inflated balloon being placed on top of a toy car. Question has 2 parts: (a) why is it that the car can still move though the balloon is already deflated? (b) list 2 ways to make the car move faster.


What are the answers?

My ans is : (a) when the air escaped from the balloon, the car gained kinetic energy and after the balloon was deflated, the car would still have some kinetic energy so it would move from point l to point m.
(b) apply lubricant on the surface of the ground and inflate the balloon more.

I said there would still be potential energy for to be converted to kinetic energy for the car to move... is it correct?? :xedfingers:

[chatterbox321]

oh yes and for part b i also put the same./…

[papaya99]

chatterbox321:

papaya99:

[quote=\"Mum of 3\"]For Science Paper 2, there is an \"energy\" question - about an inflated balloon being placed on top of a toy car. Question has 2 parts: (a) why is it that the car can still move though the balloon is already deflated? (b) list 2 ways to make the car move faster.


What are the answers?

My ans is : (a) when the air escaped from the balloon, the car gained kinetic energy and after the balloon was deflated, the car would still have some kinetic energy so it would move from point l to point m.
(b) apply lubricant on the surface of the ground and inflate the balloon more.

I said there would still be potential energy for to be converted to kinetic energy for the car to move... is it correct?? :xedfingers: [/quote]I don't really approve of the word (potential energy). And, where did the potential energy came from?

[Exam Pro]

For the MCQ Plant Question, my son put carbon dioxide. Is it water or carbon dioxide?

[psle 123]

I think it should be carbon dioxide and not water as there was a sufficient amount of water in the beaker. And as the rate of photosynthesis is more than the rate of respiration in the presence of light, the carbon dioxide would run out fast. thus, the answer should be carbon dioxide[i think]

[Verysuperkiasu]

psle 123:

I think it should be carbon dioxide and not water as there was a sufficient amount of water in the beaker. And as the rate of photosynthesis is more than the rate of respiration in the presence of light, the carbon dioxide would run out fast. thus, the answer should be carbon dioxide[i think]

my son also wrote carbon dioxide as the answer.