Q&A - PSLE Science

[Petkwang]

Thank you :celebrate:

[Petkwang]

Thank you :celebrate:

[Haneyi]

charsen:

paranoid:

please help with this question :?: :imdrowning:

http://i48.tinypic.com/2j3ikwi.png\">

Thanks in advance

Ans 1

Option D is not possible as earthworm has a segmented (muti segments) body.

Yes, that's what I think too. Option C is also not possible as the animals there do not breathe through breathing holes. ^^

[creamyhorror]

Haneyi:

charsen:

[quote=\"paranoid\"]please help with this question :?: :imdrowning:

http://i48.tinypic.com/2j3ikwi.png\">

Thanks in advance

Ans 1

Option D is not possible as earthworm has a segmented (muti segments) body.

Yes, that's what I think too. Option C is also not possible as the animals there do not breathe through breathing holes. ^^[/quote]I checked my brother's PSLE guidebook and it doesn't mention which animals breathe through breathing holes. I researched online and it turns out that many/most insects, including ladybirds and butterflies, breathe through breathing holes (spiracles). It also turns out that snails have a breathing hole, but it's probably a different type from insects'.

Is this information even in the syllabus? Surely no one would know if snails have breathing holes.

[VAL82]

Hi Haneyi,


I understand your reason to conclude (3) being the answer.
However it is flaw to conclude that statement A is incorrect. Because copper is not a magnetic material and therefore it allows magnetic force to pass through.
What I can say is the the question itself is flawed. Yes? No?

Please correct me if I am wrong.

[Robertpattinsonidle]

http://i45.tinypic.com/j9566u.jpg\"> http://i46.tinypic.com/2wrm61v.jpg\">

why is answer 3? why not 4?

[Haneyi]

VAL82:

Hi Haneyi,


I understand your reason to conclude (3) being the answer.
However it is flaw to conclude that statement A is incorrect. Because copper is not a magnetic material and therefore it allows magnetic force to pass through.
What I can say is the the question itself is flawed. Yes? No?

Please correct me if I am wrong.

Yes, I agree with you. Thank you for bringing that point up.

[cccleo]

Does anyone agree to the answer of a question on a theme park ride on page 11,9th post about the circular track ans is below the question.

Please explain I don't understand :scratchhead:

[Too young for old]

Hi. Well, for A and B, it does not nessesarily mean that if the breathing rate increase is greater, the more energy is used up. And if it’s the same, it depends on the body itself. The key word is 'based on the results in the table. No inferrence should be done.

[Too young for old]

I agree cccleo. Okay, to simplyfie it, the higher it is above mid point, the more gp it has than ke. Vice versa, the lower it is from mid point, the more ke than gp