2010 PSLE Science

[PSLEstudent2010]

scared! lots of my friends said the paper was very easy, even easier than prelim.. :stupid: anyway, taking HMT tomorrow, wish me luck!!;)


to polar bear--> as long as u wrote some of the keywords and more or less grasp what the question is asking, u should get at least half mark:)

[beauty queen]

Victoria10:

maxtan:

please tell me the 30 answer of the science MCQ answer THX

why u ask? i tink no body will rmb wat they put. :idea:

tell me the question

[PSLEstudent2010]

to DESICHAN352-->


ellos:) i'm sq:)) :love: :love:

[anon123]

I want to know ans for qns 34

It's about 'someone' is in a jungle,all the fruits and plants cant be eaten he only have the following items to produce drinkable water:
.Plastic Sheet
.Newspaper
.Towel
.String

What should he do?

Help me with this qns pls..... :idea:

[tryunited]

what is the answer on the MCQ qn on aeroplane, propellor and rubber band, which part(s) has/hv kinetic energy?


wing / propellor / rubber band

[samy]

Little Mermaid:

For the elephant question, I put :

The big ears help to trap air which is a poor conductor of heat.Thus,keeping the elephant cool. Wonder if it is correct!!! :?: :!:

my son put the larger exposed surface area can exposed heat faster :? :?

[anonymus]

tryunited:

what is the answer on the MCQ qn on aeroplane, propellor and rubber band, which part(s) has/hv kinetic energy?


wing / propellor / rubber band

i put the option which had all the 3..wing, propellor and ruber band

[kancheongmum]

Hi all


At last PSLE over for DS. Just want to share his answer for the qn where you are in the forest, given newspaper, towel , plastic sheet and string. How to get water when you are thirsty? I don’t know if it is acceptable. Science tutors or teachers please give your comments. I have a good laugh. He said that his P5 Science teacher have taught him this method of getting pure water.
I feel very high tide. I urinated on the towels. Use the string to tie on both ends of plastic sheet and then tie both ends to the trees. Place the towels under the plastic sheets. The urine evaporated and water vapour condensed on the inner surface of the plastic sheet form water droplets. Collect the prue water and drink.

[GoldenR]

the kiasu student:

One of the questions from today's paper was like this:


A 200cm metal rod was heated for 20mins and expanded to a length of 210cm. John took another 200cm metal rod, made of the same type of metal, but thicker. He heated it for 20mins. Will the length of the thicker rod be shorter or longer than 210cm or be the same? Explain.

My answer: Longer. The amount of matter in the thicker rod was more than the amount of matter in the first rod, hence the thicker rod would expand to more than 210cm. :? :? :? :? :? :? :? :? :? :? :?

Hi, i think the ans shld be shorter as the rod is thicker, it will take longer for heat to be conducted so in 10min, the length will be shorter than 210cm.

[samy]

anon123:

I want to know ans for qns 34

It's about 'someone' is in a jungle,all the fruits and plants cant be eaten he only have the following items to produce drinkable water:
.Plastic Sheet
.Newspaper
.Towel
.String

What should he do?

Help me with this qns pls..... :idea:

my son say tie the plastic sheet,onto 4 tree.then weait until morning dew,then use the towel absorb the dew with towel then drink lorh