Q&A - PSLE Science

[zombie]

@ verykiasumummy, many thanks for your answer.

But still am still puzzle, why DS answer is marked incorrect by his teacher
and why his teacher circle the word 'iron'.

http://i46.tinypic.com/r8xg1w.jpg\">
sorry to ask again, please help me with the graph question
posted on Wed Nov 07, 2012 1:56 pm

Thank you !

[Nebbermind]

zombie:

http://i47.tinypic.com/33otkt0.jpg\">


The temperature cannot suddenly plunge to 10 degrees within 2 minutes, or lose heat to the surrounding within a short period of time, unless ice cubes are dropped into the water.

how to go about answering this question ?

Think I ever come across this....like ice or something very cold being added to the water...started to melt/heat u...bringing the temp down...then when all melted, the water temp start to rise again.

[zombie]

another question,

what are the key words required ? DS seems to have verbal constipation in asnwering these questions. Please help. thanks.
http://i49.tinypic.com/2rxz5fo.jpg\">

http://i45.tinypic.com/2zq77v4.jpg\"> [IMG]

[Nebbermind]

how come the school teacher didn't run thru the papers and make the kids do correction? :scratchhead:

[Sun_2010]

zombie:

another question,

what are the key words required ? DS seems to have verbal constipation in asnwering these questions. Please help. thanks.
http://i49.tinypic.com/2rxz5fo.jpg\">

http://i45.tinypic.com/2zq77v4.jpg\"> [IMG]

the question b mentions that it should be done without any change in apparatus. So increasing the height of the ramp (actually the incliation of the ramp) would be considered a change in the apparatus.

Which school paper ? Quite tricky question :evil:

[verykiasumummy]

zombie:

http://i47.tinypic.com/33otkt0.jpg\">


The temperature cannot suddenly plunge to 10 degrees within 2 minutes, or lose heat to the surrounding within a short period of time, unless ice cubes are dropped into the water.

how to go about answering this question ?

some ice cubes / ice water / cold water has been added to the beaker.

the answer is straight forward. many questions in p5 and p6 test papers are similar like this.

[verykiasumummy]

zombie:

@ verykiasumummy, many thanks for your answer.

But still am still puzzle, why DS answer is marked incorrect by his teacher
and why his teacher circle the word 'iron'.

http://i46.tinypic.com/r8xg1w.jpg\">
sorry to ask again, please help me with the graph question
posted on Wed Nov 07, 2012 1:56 pm

Thank you !

i would think that the teacher circled the \"iron\" word because though ur ds wrote iron core but his explanation is about if steel core is used, then it will.. etc.

students must be reminded not to give a wrong explanation. if choose A, need to explain why have to choose A and not why cannot choose B.

[verykiasumummy]

zombie:

another question,

what are the key words required ? DS seems to have verbal constipation in asnwering these questions. Please help. thanks.
http://i49.tinypic.com/2rxz5fo.jpg\">

http://i45.tinypic.com/2zq77v4.jpg\"> [IMG]

a) ball w as it travelled the shortest distance because the friction between the ball surface and the ground is the greatest.

(use friction between surface 1 and surface 2, produce is a wrong word to use)

b) he can release the ball at a higher position on the ramp. the higher the position of the ball being released, the greater the gravitational potential energy it possessed, hence converted to more kinetic energy to move to a longer distance.

hope it helps..

[Robertpattinsonidle]

verykiasumummy:

zombie:

another question,

what are the key words required ? DS seems to have verbal constipation in asnwering these questions. Please help. thanks.
http://i49.tinypic.com/2rxz5fo.jpg\">

http://i45.tinypic.com/2zq77v4.jpg\"> [IMG]

a) ball w as it travelled the shortest distance because the friction between the ball surface and the ground is the greatest.

(use friction between surface 1 and surface 2, produce is a wrong word to use)

b) he can release the ball at a higher position on the ramp. the higher the position of the ball being released, the greater the gravitational potential energy it possessed, hence converted to more kinetic energy to move to a longer distance.

hope it helps..

i hope this helps

do tell ur daughter that it is important to write specific answers using right terms. produce friction is wrong. friction produced during.... is right. note that point.

thanks,
Robertpattinsonidle ft.JB

[Robertpattinsonidle]

verykiasumummy:

zombie:

http://i47.tinypic.com/33otkt0.jpg\">


The temperature cannot suddenly plunge to 10 degrees within 2 minutes, or lose heat to the surrounding within a short period of time, unless ice cubes are dropped into the water.

how to go about answering this question ?

some ice cubes / ice water / cold water has been added to the beaker.

the answer is straight forward. many questions in p5 and p6 test papers are similar like this.

one possible answer is... the hot water was kept inside the freezer.