Q&A - P3 Science

[atutor2001]

teh_oh:

Hi,
May I ask, if 'rubber' is consider as a 'non-living thing' that is once alive? If yes, then 'sap' of a tree is consider alive on its own? Is an orange consider as a living thing?

Hi teh oh

Firstly, I would consider 'rubber' as a 'non-living thing' that was from things that are once alive and not \"rubber was once alive\"

Imo, 'sap' should be classified as not alive even when it is in a live tree because 'sap' is only part of the cells (if I am not wrong). I asked myself is blood alive and my answer is no. So I apply the same logic. Another example is, \"Is silk once alive?\" My answer is no but silk is from things that were once alive.

Honestly I really don't know the answer as the definition of alive is not specific. However, I think the real problem is that over the years, some questions have been wrongly phrased, omitting the words \"from things\" and the questions being shortened to \"rubber is once alive\". It should be \"rubber is from things that are once alive.\"

Just my opinion.

Regards

[teh_oh]

hi atutor2001,

thanks for clarifying.
is an orange alive? since ‘sap’ is not alive, i would conclude that oranges are not alive but from things that are alive. correct? thanks again.

[atutor2001]

teh_oh:

hi atutor2001,

thanks for clarifying.
is an orange alive? since 'sap' is not alive, i would conclude that oranges are not alive but from things that are alive. correct? thanks again.

Hi teh_oh, sorry that I have no conclusive definition of alive. If a teacher asks me whether is an orange alive, I would be very :x because there are seeds in the orange which is alive but the other parts of the orange are not alive. So probably I would say that an orange is alive since there are seeds inside :lol:

PS
Sorry teh-oh, my above answer is wrong. You are correct that oranges are not alive but from things that are once alive.

I keep forgetting that in science, the fruit and the seeds are considered as separate entities. That is, orange would refer to only the skin and flesh, excluding the seeds, which is why the children are taught that the \"fruit protects the seeds\".

[24hr-mum]

i heard that moe has taken out the topic of "made from things alive or once alive" from the syllabus due to the confusion. but i guess the topic of whether something is "living" or "non-living" remains?

[teh_oh]

Hi parents,


Q1: It is about putting a steam bun in a dark place. Q is what organism is found on the bun after a few days.
Child's Ans: Bread mould.
Ans key: Mould.

Is 'bread mould' acceptable, or should I ask my child to stick to 'mould'?

Q2:
http://postimage.org/image/1tlyazjtw/
Child's Answer for (a) is \"flight feathers\".
Should I ask my child to stick to 'feathers' only?

For (b) while child wrote 'To help it to fly', he asked if 'To keep the bird warm' can be consider one of the answers. Can?
Answer key is \"It can fly\".


Q3:
http://postimage.org/image/oez0la5g/
Child's answer: To find out which material is waterproof.
Answer key is: To find out which material absorb the most water.
Is child's answer acceptable?


Many thanks!

[atutor2001]

Hi teh_oh


Very interesting questions. Below are just my personal views :

(a) I would play safe and use \"mould\" because Pr syllabus did not cover the different types of mould. Furthermore, we cannot conclude from the question that the type of mould is \"bread\" mould even though it is growing on a bun/bread.

(b) I would use \"feather\" because the pr syllabus did not cover the different types of feather and the arrow did not point at the flight feathers.

(c) I would use \"To fly\" because the arrow points at the wing.

(d) I would use \"To find the amount of water absorbs/retains by each material.\" as it is safest to specify an aim that covers the broadest area that the experimental results can conclude. That is, with this aim, we can also conclude for which material is waterproof and which material absorbs the most water and I cannot be deemed to be wrong.


Cheers

[teh_oh]

Hi atutor2001,

Thanks for the replies!

[Charnic]

CNS:

The question goes like this. The heading is \"Animals that reproduce by laying eggs\" Then it has group X and Group Y. Animals in group X consist of Frog, Housefly and butterfly. As for Group Y, they have chicken, cockroach and crocodile. So they ask which of the following group of animals are correctly classify in group X and Y


A) Mosquito and Pigeon
B) Grasshopper and Snake

Answer is A but why ? Pls kindly advise urgently. Thanks a ton.

Anyone can help ? Thanks

[atutor2001]

CNS:

CNS:

The question goes like this. The heading is \"Animals that reproduce by laying eggs\" Then it has group X and Group Y. Animals in group X consist of Frog, Housefly and butterfly. As for Group Y, they have chicken, cockroach and crocodile. So they ask which of the following group of animals are correctly classify in group X and Y


A) Mosquito and Pigeon
B) Grasshopper and Snake

Answer is A but why ? Pls kindly advise urgently. Thanks a ton.

Anyone can help ? Thanks

Answer is A because Chicken cockroach and crocodile have 3-stage life cycle while the other group as 4-stage.

[Charnic]

atutor2001:

CNS:

[quote=\"CNS\"]The question goes like this. The heading is \"Animals that reproduce by laying eggs\" Then it has group X and Group Y. Animals in group X consist of Frog, Housefly and butterfly. As for Group Y, they have chicken, cockroach and crocodile. So they ask which of the following group of animals are correctly classify in group X and Y


A) Mosquito and Pigeon
B) Grasshopper and Snake

Answer is A but why ? Pls kindly advise urgently. Thanks a ton.

Anyone can help ? Thanks

Answer is A because Chicken cockroach and crocodile have 3-stage life cycle while the other group as 4-stage.[/quote]Thanks for the reply, but it looks like the answer got to do with the way they lay eggs. The topic is about classification and the child has yet to touch on life cycle yet...