Q&A - PSLE Science

[verykiasumummy]

jewelbox:

Very kiasumummy, thanks for the explanation. You make it so easy to understand.:)

hi jewelbox,

welcomed... i'm a mother of 3 and i like to coach my kids on sci very much... learnt from them and the teachers...

[Robertpattinsonidle]

charsen:

Robertpattinsonidle:

[quote=\"Clairifina\"]Why does an e-z link card not work when it is placed in a wallet with a magnet?

the card will not be scanned as the magnet interrupts the machine that scans or it may also be becuz of the reason that the card is attracted to the magnet. anyway it is a fact to prevent keeping magnets near electronics such as mobilephones etc. so i guess that it is bcos of blocking the fieldwaves to scan the card.

Hi Robbertpattinsonidle,
I am back .
The part where you mentioned that magnet interrupts the machine,that is where you did not explain in science terms.
Here is a alternate answer:
The card will not be scanned as the magnet would affect the information stored in the ez-link card.Thus,the machine would not be able to scan the card since the information in the card is lost.
Cheers[/quote]Ok. Thanks anywat. I would learn to write it the smart \"charsen way\" Haha!

[Nebbermind]

verykiasumummy:

jewelbox:

Very kiasumummy, thanks for the explanation. You make it so easy to understand.:)

hi jewelbox,

welcomed... i'm a mother of 3 and i like to coach my kids on sci very much... learnt from them and the teachers...

If C is not opaque, then how is the shadow of the ring formed?

[Michaelia0816]

I need help,

Links,
1) http://t.co/pVbDOcHo
2) http://t.co/e12NEqCP
3) http://t.co/GTyc2ZIZ

Pls explain, I a bit messed up here!

[verykiasumummy]

Nebbermind:

If C is not opaque, then how is the shadow of the ring formed?

i'm not an expert, but i will ask my dd's sci teacher when she comes later... i'm eager to find the truth too....

[verykiasumummy]

Michaelia0816:

I need help,

Links,
1) http://t.co/pVbDOcHo
2) http://t.co/e12NEqCP
3) http://t.co/GTyc2ZIZ

Pls explain, I a bit messed up here!

1. ans is 1 (A is higher than B so when travelling from A to B, the PE decrease due to decrease in height, KE decrease because the slope is less steep than the upper portion, means less speed, so less KE)
2. ans is 4 (if more rubbish is collected yet disposed of is less than the previous yr, it means the rubbish collected were recycled so makes less rubbish to be finally disposed.)
3. ans is 3. (under grp A, both have curved beaks, under B, both have straight beaks. and S is beak longer than head, so T is beak shorter than head.)

hope it helps.

[charsen]

Nebbermind:

verykiasumummy:

[quote=\"jewelbox\"]Very kiasumummy, thanks for the explanation. You make it so easy to understand.:)

hi jewelbox,

welcomed... i'm a mother of 3 and i like to coach my kids on sci very much... learnt from them and the teachers...

If C is not opaque, then how is the shadow of the ring formed?[/quote]Hi
The shadow of the ring is formed by the outlines of the ring.
cheers

[charsen]

Michaelia0816:

I need help,

Links,
1) http://t.co/pVbDOcHo
2) http://t.co/e12NEqCP
3) http://t.co/GTyc2ZIZ

Pls explain, I a bit messed up here!

Hi
Long time no see.Good luck for your psle.
Q1.Answer is 1.When a object is moving in the slope downhill,the potential energy decreases while the kinetic energy in the object increases since more potential energy is converted to kinetic energy.Topic:Energy Concept:conversions of energy.

Q2.Answer could be only 4.Recycling the waste could be the only way as it is recycled into new products.Option 1 is definetly out and option 2 and 3 is a form of rubbish disposal.Topic:Man and his environment Concept:reducing waste dumped

Q3.This question has to do with your observation.If you observe carefully,you would realise that birds grouped in A have beaks longer than their heads and T has a straight pointed beak.Answer 3.

Cheers

[Michaelia0816]

Thx both of you, I understood!

[Tiramisu Coco]

Hi, need help for part (b) of this qtn. Thk u.


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