Q&A - PSLE Science

[Michaelia0816]

Ops, I forgot to thank you. Thank you Charsen.

[Michaelia0816]

Fat Mama:

Hi,


Can a single (one) lizard be counted as a population on a plant?

Teacher said need at least 2 to be a population. Is it true?

Tks

Yes, of course. Anything at least one is a population, except it is same kind but different stage of life cycle.

[charsen]

Fat Mama:

Hi,


Can a single (one) lizard be counted as a population on a plant?

Teacher said need at least 2 to be a population. Is it true?

Tks

No.
It could be considered as only a living organism.A population is considered 2 or more of the same species living in the same community.The young of the species is also considered in the population.Therefore,your teacher is absouletely right.
cheers

[Michaelia0816]

Ok, I thought a population is make up at least 1, I learnt something new again!

[Fat Mama]

charsen:

Fat Mama:

Hi,


Can a single (one) lizard be counted as a population on a plant?

Teacher said need at least 2 to be a population. Is it true?

Tks

No.
It could be considered as only a living organism.A population is considered 2 or more of the same species living in the same community.The young of the species is also considered in the population.Therefore,your teacher is absouletely right.
cheers

Tks charsen

[Michaelia0816]

Charsen, pls help again,

From PSLE booklet,
Links:
1) http://t.co/Ir07tSpB

I will post some later or tomorrow.

[charsen]

Michaelia0816:

Charsen, pls help again,

From PSLE booklet,
Links:
1) http://t.co/Ir07tSpB

I will post some later or tomorrow.

Hi
The answer is (2).C is not correct as the heated flame heats up the air surrounding the front of rod x since the flame is in front of rod x.Thus,the heated flame does not cause the heated air to move the rod x near to the magnet.Instead,it should push the rod behind which is false.Therefore,C is wrong and the only answer could be a and b.
cheers.

[ms_lim]

Can someone help to explain this question :


http://i45.tinypic.com/2uzqr7s.jpg\">

[ms_lim]

Can someone help to explain the answer to this question? DS ans is 4 but answer key is 2


http://i49.tinypic.com/vskyh0.jpg\">

[ms_lim]

http://i50.tinypic.com/344d0td.jpg\">


Is Plant --> Arctic Fox considered as a food chain or a food chain needs to have at least 3 links?