Q&A - P3 Science

[Flipper123]

ChiefKiasu:

I tried to do the P3 Science exams from the top schools and... there's no way I can score 100 for it myself! It's REALLY tough considering that the kids just started science this year. Aside from learning names and stuff (thorax, abdomen, etc), the questions were focused more on application of what they learn... so it was really like conducting investigative work. A lot of the questions were really subjective.


Some examples:
1. What are the purpose of feathers on peacocks
(A) They help the peacock fly
(B) They protect the peacock's skin
(C) They are used to attract mates
(D) They keep the peacock warm

Answer:
(1) B, C, D
(2) B, D
(3) A, B, C, D
(4) C

2. A Molly:
(A) Gives birth to its young
(B) Lays eggs
(C) Is a plant
(D) Is an insect

Anyone dare attempt these questions? Play fair - no googling until you actually tried to answer.

The first question's answer is 3. The second question answer is 1.

[usaik]

I found these in one of the top school paper which I felt is confusing…


Q1. When an electric wire is coiled around an iron nail, the iron nail _____
(1) melts
(2) becomes hot
(3) remains unchanged
(4) has properties of a magnet

The answer given is (4). However, it is also not wrong for (2) to be the answer as the coil will be heated up due to the wire and hence heat up the iron nail. As (4) is the most appropriate answer, I would think most students shouldn’t have problem getting it right.


Q2. The pull of a magnet is not likely to pass through a
(1) plastic wrapper
(2) piece of steel plate
(3) thick piece of wood
(4) piece of tracing paper

I think that the answer for the above can either be (2) because mangetic forces cannot pass through magnetic material. But given that (3) the piece of wood is thick, the pull of magnet may also not be able to pass through the piece of wood. However, given that this question is concerning the topic on magnet, I actually think that the most appropriate answer is (2). However to my surprise, the given answer is (3).

I hope school doesn’t set this kind of confusing questions.

[atutor2001]

usaik:

I found these in one of the top school paper which I felt is confusing....


Q1. When an electric wire is coiled around an iron nail, the iron nail _____
(1) melts
(2) becomes hot
(3) remains unchanged
(4) has properties of a magnet

The answer given is (4). However, it is also not wrong for (2) to be the answer as the coil will be heated up due to the wire and hence heat up the iron nail. As (4) is the most appropriate answer, I would think most students shouldn't have problem getting it right.


Q2. The pull of a magnet is not likely to pass through a
(1) plastic wrapper
(2) piece of steel plate
(3) thick piece of wood
(4) piece of tracing paper

I think that the answer for the above can either be (2) because mangetic forces cannot pass through magnetic material. But given that (3) the piece of wood is thick, the pull of magnet may also not be able to pass through the piece of wood. However, given that this question is concerning the topic on magnet, I actually think that the most appropriate answer is (2). However to my surprise, the given answer is (3).

I hope school doesn't set this kind of confusing questions.

If this is a test on English,

Answer for Q1 is (3) because the question did not state that there is current flowing through the electric wire. So, without current, nothing will happen to the iron nail.

Answer for Q2 is (3) because the question asked is \"not likely\". For magnetic material, it is \"definitely\" that magnetic force cannot pass through and not \"not likely\".

But then this is not an English paper. So how???? :lol:

[usaik]

so how?? :?

[atutor2001]

usaik:

so how?? :?

Never mind lah. Let the teachers have some fun. In PSLE, such ambiguity seldom appear. Anyway, it`s good training from young for comprehension and analysis skill, essential for GP :lol:

[teh_oh]

http://postimage.org/image/1yr9pat50/


Answer key: 3
Child, Husband and I think that it is 1.

3 or 1? Do platypuses live in water?

[tianzhu]

teh_oh:

Answer key: 3
Child, Husband and I think that it is 1.

3 or 1? Do platypuses live in water?

Hi teh_oh

Good Afternoon.

These links may help to answer your question.

http://australian-animals.net/plat.htm
http://www.goldcoast.qld.gov.au/attachment/platypus_fact_sheet.pdf

Best wishes

[teh_oh]

tianzhu:

teh_oh:

Answer key: 3
Child, Husband and I think that it is 1.

3 or 1? Do platypuses live in water?

Hi teh_oh

Good Afternoon.

These links may help to answer your question.

http://australian-animals.net/plat.htm
http://www.goldcoast.qld.gov.au/attachment/platypus_fact_sheet.pdf

Best wishes

Hi Tianzhu,

Thanks for the links.
They mostly indicate the platypus live on the banks, technically, not in water. So i think our answer of 1 should be correct.

[tianzhu]

Hi teh_oh


I think you can take it that they can live in water.

Here’s another link.
http://www.environment.nsw.gov.au/animals/ThePlatypus.htm

Best wishes

[2bbtang]

Hi, can anyone here advise me?


My son’s recent CA’s question:

Dave set up the experiment as shown below and left them untouched for one week.

It show 4 different experiment setups. I will describe as below.

SetupA: 1 grasshopper in a tank with leaves and cover with a lid with holes.
SetupB: 1 grasshopper in a tank with leaves and cover with enclosed lid (without holes).
SetupC: 1 grasshopper in a tank and cover with a lid with holes.
SetupD: 1 grasshopper in a tank and cover with enclosed lid (without holes)

One of the question was asked:

What does Dave’s experiment shows that living things need ________ to survive.

They are supposed to put a tick on the correct boxes for the above question.

Air
food
water
space

My son : indicate 2 ticks on the above question : He tick for AIR and FOOD.

But the teacher answer it as : Air, Food and Water.

My son told me this question is so unfair. cos’ the question asked "From Dave’s experiment. And in the experiment, there isn’t any WATER??? If the question asked in a more general way like "what does living things need _____ to survive, it it more straight forward. But it indicate as "Dave’s experiment", isn’t I suppose to based on the experiment?

What do you think? I felt my boy is correct too…