2011 PSLE Discussions and Strategy

[Pen88n]

OrangeJuice:

You mean the MCQ one ? Its the same . Gravity dont change .

Even when height is different?[/quote]

I thought it is gravitational energy that will change when the height is different? I thought gravitational force depend on mass? :scratchhead:[/quote]

That was how my DD explained to me too when I thot height affects the gavity lvl....[/quote]

Gravitational potential energy will change due to height, but it is not gravitational energy or force. Gravitational potential energy is the one that will change to kinetic energy when things start falling from a height or sliding down from a height. Note the difference.

[moirwong]

Q43, sand-pond question, anyone remember wat answer you wrote?

btw, why does the bird's back face the sun :rahrah:

[Guitar]

moirwong:

q43 sand-pond question. Is the water polluted? Why?

my dd write that the water is polluted because harmful chemicals that are colourless could be mixed with the water.

[papaya99]

moirwong:

q43 sand-pond question. Is the water polluted? Why?

My ans is : yes. Because other soluble impurities may be present in the water even though you cannot see them.

[stickyz]

Guitar:

moirwong:

q43 sand-pond question. Is the water polluted? Why?

my dd write that the water is polluted because harmful chemicals that are colourless could be mixed with the water.

I wrote: Water is polluted as harmful bacteria that cannot be seen through the naked eye might be in the water. (not sure if i am correct though).

[moirwong]

Yours sound correct. my dd says she wrote polluted but wrote some rubbish for the reasoning

[Junglezoo]

Guitar:

moirwong:

q43 sand-pond question. Is the water polluted? Why?

my dd write that the water is polluted because harmful chemicals that are colourless could be mixed with the water.

Hi, I said that it was to ensure only clear water comes out. (Need not to mention if water is polluted.)

[papaya99]

moirwong:

Q43, sand-pond question, anyone remember wat answer you wrote?

btw, why does the bird's back face the sun :rahrah:

My ans is : bird P's back is dark and it faces it's back to the sun so as to absorb more heat to survive in the cold environment.

[stickyz]

What about the soil particles one (the one about pouring water through it)? Anyone remember your ans?

[Tinkerbelle]

Smurfiees:

I'm safe ! WOOT . :hi5: Anyways , whats ds and dd ? Im so noob ;_;

DS - Dear/Darling Son
DD - Dear/Darling Daughter