2010 PSLE Science

[Victoria10]

Blockbuster:

MCQ easy, but open-ended difficult. Question on toilet bowl flushing system?!

well not really on that thing. it's bout properties of matter.

[Blockbuster]

There is a bottle mentioned, what is it for?

[jackaljaysen]

anonymus:

Hi friends,


Can u pls share yr answers 4 the follw qts:

1) Car windscreen - how can he c

2) In Forest how 2 get H20 with newspaper,string.....etc

3) Big elephant with big big ears n small ele with small ears - in forest

4) Rod b changed 2 greater thickness - effect of expansion

5) Y the nail cannot magnetised with northpole

6) Decomposition - how 2 increase?

[/quote]

Ok,I cannot do the second q u asked, and only one way for q6. :stupid:

My Answer:
1) Heating allows the water droplets on windscreen to evaporate,enabling him to have a clearer vision of the vehicles and pedestrians behind him.
2) Don't know.I just any how do. :stupid: :?:
3)Advantage: Ears have bigger e.s.a. , allowing the elephant to lose heat easily,keeping it cool.
Disadvantage: The rainforest is much cooler than the ___, it loses too much heat,and might die because it has not enough heat to live.
4)lesser than 210cm3. It is thicker.More heat isneeded to heat up the rod, so the expanxion is lesser.]
5) The north pole of magnet attracted the south atoms to one side of the rod,the other magnet did not have any atoms to be moved to the other side of the rod, so not sucessful.
6) I only know one way: add more decomposers and scavengers into the bin. Scavengers: To break down e smaller pieces of dead leaves into smaller pieces.
Decomposers: To break down e smaller pieces of dead leaves into simpler forms.

Just hope the answers above r correct.

JJ

[Little Mermaid]

I was SOOOOOOOO....Scared. Tis time round for Science is difficult leh!! :shock: I was STUNNEDDDD. Haizzz...Hope tomorrow the higher chinese paper would be EASY!!! STUDY HARD!!!!! :rubhands:

[Little Mermaid]

Blockbuster:

MCQ easy, but open-ended difficult. Question on toilet bowl flushing system?!

Its 'bout MATTER. Good Thing i know how to answer!!!

[jackaljaysen]

Victoria10:

Blockbuster:

MCQ easy, but open-ended difficult. Question on toilet bowl flushing system?!

well not really on that thing. it's bout properties of matter.

Yes. :?

[jackaljaysen]

Little Mermaid:

I was SOOOOOOOO....Scared. Tis time round for Science is difficult leh!! :shock: I was STUNNEDDDD. Haizzz...Hope tomorrow the higher chinese paper would be EASY!!! STUDY HARD!!!!! :rubhands:

I also taking HCL. Good luck 2 u too! :celebrate: :imanangel:

[jackaljaysen]

the kiasu student:

Please vote on monday after the science paper. :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate::celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate::celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate::celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate: :celebrate:

:spam:

[jackaljaysen]

momof3musketters:

Hi,


my son's science tutor ask him to remember:
Singapore Is Not Clean

Good luck! :celebrate:

Mine damn lame.
I Saw Nine Cats
AND
I Can Not See

[James Ang]

1. Heating the windscreen makes the windscreen's temperature higher than the temperature of surrounding water vapour so that condensation will not take place on the windscreen to make the windscreen blurry. Condensation takes place when water vapour touches a cooler surface.


2. To get water from the water vapour, I believe a cool surface needs to be formed using a waterproof sheet to collect water vapour that condenses overnight into a cup/container due to the temperature difference between cold nights and warmer early morning. This is similar to how dew is formed on leaves of plants in the morning.

3. Not sure what they ask in the exam but could the big elephant have bigger ears due to structural adaptation, to help cool down his bigger body, compared to the smaller elephant with smaller ears.

5. Could the nail have already been magnetised and stroking it one way will make it stronger while stroking it the opposite way will demagnetise the magnetic nail?

jackaljaysen:

anonymus:

Hi friends,

Can u pls share yr answers 4 the follw qts:

1) Car windscreen - how can he c

2) In Forest how 2 get H20 with newspaper,string.....etc

3) Big elephant with big big ears n small ele with small ears - in forest

4) Rod b changed 2 greater thickness - effect of expansion

5) Y the nail cannot magnetised with northpole

6) Decomposition - how 2 increase?

Ok,I cannot do the second q u asked, and only one way for q6. :stupid:

My Answer:
1) Heating allows the water droplets on windscreen to evaporate,enabling him to have a clearer vision of the vehicles and pedestrians behind him.
2) Don't know.I just any how do. :stupid: :?:
3)Advantage: Ears have bigger e.s.a. , allowing the elephant to lose heat easily,keeping it cool.
Disadvantage: The rainforest is much cooler than the ___, it loses too much heat,and might die because it has not enough heat to live.
4)lesser than 210cm3. It is thicker.More heat isneeded to heat up the rod, so the expanxion is lesser.]
5) The north pole of magnet attracted the south atoms to one side of the rod,the other magnet did not have any atoms to be moved to the other side of the rod, so not sucessful.
6) I only know one way: add more decomposers and scavengers into the bin. Scavengers: To break down e smaller pieces of dead leaves into smaller pieces.
Decomposers: To break down e smaller pieces of dead leaves into simpler forms.

Just hope the answers above r correct.

JJ[/quote]