Q&A - P3 Science

[jedamum]

PiggyLalala:

jedamum:

[quote=\"PiggyLalala\"][quote=\"jedamum] piggylalala,

my boy is also having confusion over hard vs strong, fragile vs durable, elastic vs flexible.
whether wood is hard, have to have something to compare with.
hard objects can be glass. glass is hard, but brittle.

yupp.. same here.. so hard does not mean strong???

nonono...that is a common mistake.
Hard is the ability to withstand scratches.
Strong aka Strength is the ability to withstand load.
Glass is hard but not strong.[/quote][/quote][/quote]

Thanks ...i know.. but can give examples of strong and hard object? metal?
stones considered as hard ???[/quote][/quote][/quote][/quote]
i think stones are consider as hard too.
for strength, it is relative. ie have to be compared with something.
eg of strong and hard objects are concrete, rocks, iron, steel, certain plastics, wood.
eg of weak and hard objects are glass, ceramics
eg of strong and soft objects are nylon and leather
eg of weak and soft objects is chalk

anyone wanna add/amend?

[ttyh]

Do the roots of a plant carries water and food to other parts of the plants or they only carry water?

[Charnic]

ttyh:

Do the roots of a plant carries water and food to other parts of the plants or they only carry water?

I taught my gal roots absorb water and mineral salt from the soil and it is the Xylem carrying tubes that transport them to all other parts of the plant.

Sigh.. it is really madness, having to do all these again ! Looking forward to 2nd Nov, which is the end of SA2 :rahrah:

[ttyh]

So the xylem carries the water and minerals, not only water?

[Charnic]

ttyh:

So the xylem carries the water and minerals, not only water?

Yes. Xylem carries water and minerals. As for food, also known as sugar is being transported by the Phloem.

[Just4Good]

CNS:

ttyh:

So the xylem carries the water and minerals, not only water?

Yes. Xylem carries water and minerals. As for food, also known as sugar is being transported by the Phloem.

Fact: The food plants make is sugar. Not sure if this is true.

[Just4Good]

Please help to advice … is paperclip a system ? How about plastic bag ? Thanks.

[Nebbermind]

Just4Good:

Please help to advice .. is paperclip a system ? How about plastic bag ? Thanks.

I would have thought that a system compises of different things. These 2 donch look like system to me. But I am only guessing!!

[24by7_mum]

A system is made up of different parts that work together to perform a task. e.g. torch, handphone, bicycle.


Don’t think paper clip or plastic bag is a system.

[jedamum]

24by7_mum:

A system is made up of different parts that work together to perform a task. e.g. torch, handphone, bicycle.


Don't think paper clip or plastic bag is a system.

so a paper clip with a decorative flower ornament is not a system?