Q&A - P3 Science

[corneyAmber]

shurley197323:

[Moderator's note: Topics merged.]


I have 1 question here bcos my girl's insisted that her answer is right but its not the same as the answer from \"Old School Test paper.

(1) Mould & ferns reproduce by spores
(2) Mould reproduces by spores but fern reporoduces by seed

My girl's answer is (1) but the paper answer is (2)
She say non flowering plants reproduce by spore not seeds.

Your girl is the smart one.
Ferns are vascular plants . They differ from seed plants in their mode of reproduction—lacking flowers and seeds.
At this level, I believe they will learn characteristics by grouping generally, i.e. flowering and non-flowering plants.

Just for general knowledge, conifers are exception of non-flowering but can produce seeds

[shurley197323]

Thks Ks2me.

Anyone know where I can get the list of like which are
(1) floating plants (2) totally submerged plants (3) flowering plants
(4) non flowering plants. (5) Poisonous plant (6) non- poisonous plants
Because most of these information are not in the text book .
Sorry for being so troublesome .

[shurley197323]

Sorry again. I got the list already from thr assessment book that I bought.

Thanks

[jesschan]

My son had a science test recently and one of the question is what kind of materials can be used to make schoolbags. He put down the answer as fabric and leather but was marked wrong for leather. The teacher told him that leather is too expensive and heavy to be used for schoolbags. What is your take on this?

[csc]

I agree with the teacher. Leather is not a common material used to make school bags so , may not be acceptable in this case.

[shurley197323]

I check with the internet, the common material for school bag are canvas, polyester, nylon and PVC.

[ChiefKiasu]

shurley197323:

I check with the internet, the common material for school bag are canvas, polyester, nylon and PVC.

At the prices some of these bags are going for these days, I think school bags are made from paper money and plastic credit cards. And lot's of parents' sweat and tears.

[jesschan]

ChiefKiasu:

shurley197323:

I check with the internet, the common material for school bag are canvas, polyester, nylon and PVC.

At the prices some of these bags are going for these days, I think school bags are made from paper money and plastic credit cards. And lot's of parents' sweat and tears.

Ha ha!

Jokes aside, I just thought that though it is not common to use leather for school bags, it is not entirely wrong because bags can be made from leather and leather bags can be used by mature students as school bags.

Anyway, thanks!

[corneyAmber]

ChiefKiasu:

shurley197323:

I check with the internet, the common material for school bag are canvas, polyester, nylon and PVC.

At the prices some of these bags are going for these days, I think school bags are made from paper money and plastic credit cards. And lot's of parents' sweat and tears.

haha...can't agree more....that debunks all normal science....should be social science.

[Vanilla Cake]

Hi All,


TIA for your time and effort to answer this P4 SA1 2008 SCGS Q26 :

Coleen conducted an experiment by measuring the length of her shadow on the ground at different time intervals over one day. She remained at the same spot for the whole duration. The following graph shows her findings.

http://farm4.static.flickr.com/3605/3485359483_2d5d23354b.jpg\">

(a) What is the relationship between the length of the shadow and the time of the day (1 mark)

(b) Explain your answer in (a) (1 mark)
Suggested answer given by the worksheet is confusing. :? Pls see below :

(a) The length of the shadow gets shorter the time is nearer to 12.00 pm and increases again after 12.0pm

(b) The sun moves from the east to the west. At 12.00 pm the sun is directly overhead but at 8.00 am and 6.00 pm, it is low in the sky.