Q&A - P4 Science

[Jamesbond]

Michaelia0816:

I think it is 4 too.

Thank u all for ur explanations....Great work..... :salute:

[Michaelia0816]

You’ re welcome, I should thank you instead, I also forgotten that life cycle… Can be found in my PSLE

[Jamesbond]

http://i46.tinypic.com/ne9n4z.jpg\">


Hi,

For the b Questn... Tree B roots were long and anchored tightly to the ground during the storm while Tree A roots were short nd could not hold onto the ground tightly.

Think this is correct. If wrong pl correct me.

But for the c Questn...can somebody give me the answer.....

Thanks in advance.

[Champion]

Jamesbond:

http://i46.tinypic.com/ne9n4z.jpg\">


Hi,

For the b Questn... Tree B roots were long and anchored tightly to the ground during the storm while Tree A roots were short nd could not hold onto the ground tightly.

Think this is correct. If wrong pl correct me.

But for the c Questn...can somebody give me the answer.....

Thanks in advance.

Ans: (B) - Roots take up water and minerals, such as nitrogen and sulfur, from the soil.

[kiasuMay11]

Champion:

Jamesbond:

http://i46.tinypic.com/ne9n4z.jpg\">


Hi,

For the b Questn... Tree B roots were long and anchored tightly to the ground during the storm while Tree A roots were short nd could not hold onto the ground tightly.

Think this is correct. If wrong pl correct me.

But for the c Questn...can somebody give me the answer.....

Thanks in advance.

Ans: (B) - Roots take up water and minerals, such as nitrogen and sulfur, from the soil.

P4 already know nitrogen and sulfur?

[24hr-mum]

two containers of equal size, E and F, are half filled wf iced cold water. E is made of alumunium; F made of clay. wat happens aft 10min?

why is the answer "more water droplets will b found on outer surface of E than F?

[Jamesbond]

kiasuMay11:

Champion:

[quote=\"Jamesbond\"]http://i46.tinypic.com/ne9n4z.jpg\">


Hi,

For the b Questn... Tree B roots were long and anchored tightly to the ground during the storm while Tree A roots were short nd could not hold onto the ground tightly.

Think this is correct. If wrong pl correct me.

But for the c Questn...can somebody give me the answer.....

Thanks in advance.

Ans: (B) - Roots take up water and minerals, such as nitrogen and sulfur, from the soil.

P4 already know nitrogen and sulfur?[/quote]Actually the answer given is During a dry spell, the upper part of the ground would dry up and the lower part is harder too. Hence the roots should be longer to absorb the water and mineral salts to make food. If roots are shorter they cannot absorb them.

My doubt is.....if we just say The roots should be longer to absorb the water and mineral salts. If they are shorter they cannot absorb them. Is this answer correct this way or...

Shud we add up and say abt the dry spell reason......I donno...somebody help me...

[AgonyMum]

Hi, need help regarding this :

Q1)How many stages are there in the life cycle of the balsam and the bean plant?
What are the stages?

Apparently, one of them has 3 stages but not the other.

Q2) If a female mosquito lays its eggs on 15 June, on approximately which day can we expect the number of mosquitoes to increase in that area?
a) 28 July
b) 15 July
c) 28 June

Thanks in advance!

[24hr-mum]

how to do?

[charsen]

AgonyMum:

Hi, need help regarding this :

Q1)How many stages are there in the life cycle of the balsam and the bean plant?
What are the stages?

Apparently, one of them has 3 stages but not the other.

Q2) If a female mosquito lays its eggs on 15 June, on approximately which day can we expect the number of mosquitoes to increase in that area?
a) 28 July
b) 15 July
c) 28 June

Thanks in advance!

Hi
Q1 It is impossible for a plant to have four stages in the life cycle.If you look into the primary syllabus,a plant has 3 stages.
Q2 If you search in the internet,it takes approximately 3 weeks to grow fully as a adult.Thus, the answer is (b).
Cheers