Q&A - PSLE Science

[ms_lim]

Can help to explain this question :


http://i46.tinypic.com/1zv78ug.jpg\">

Material______Allows all light to pass through________Does not allow light to pass through________Not possible to tell
P
Q
R
S

[mamago]

ms_lim:

Can help to explain this question?


The changes in the light intensity and temperature in a particular habitat in Singapore were recorded throughout the day. The graph and the table below show the light intensity and temperature of the habitat respectively.

http://i50.tinypic.com/2r6zi4j.jpg\">

Which of the following habitat is most likely to have the conditions described above?
(1) pond
(2) leaf litter
(3) seashore
(4) school field

Answer is (2) Leaf litter. (the habitat is the soil under the leaf litter.)

(Litter: material forming a surface-covering layer.)

[ms_lim]

mamago:

ms_lim:

Can help to explain this question?


The changes in the light intensity and temperature in a particular habitat in Singapore were recorded throughout the day. The graph and the table below show the light intensity and temperature of the habitat respectively.

http://i50.tinypic.com/2r6zi4j.jpg\">

Which of the following habitat is most likely to have the conditions described above?
(1) pond
(2) leaf litter
(3) seashore
(4) school field

Answer is (2) Leaf litter. (the habitat is the soil under the leaf litter.)

(Litter: material forming a surface-covering layer.)

Thanks for the explanation mamago.

[mamago]

ms_lim:

http://i48.tinypic.com/105tvd2.jpg\">

Can help to explain this question?

Answer should be (2)... increase the particles in the air

Cloud seeding, a form of intentional weather modification, is the attempt to change the amount or type of precipitation that falls from clouds, by dispersing substances into the air that serve as cloud condensation or ice nuclei, which alter the microphysical processes within the cloud.

[mamago]

Sorry, Ms Lim. I have to leave home now, answer the other 2 questions when I am back.

[charsen]

ms_lim:

Can help to explain this question :


http://i48.tinypic.com/5kn9s1.jpg\">

Hi
The answer is 2.
Reason:Since the animals sleep underground at night,it is likely that organism X would hunt in the day.Hence,options 1 and 4 are out.
It needs wide and padded feet to have grip on the snowy surface and move quickly on the snow.
Charsen.

[charsen]

ms_lim:

Can someone help to explain this question :


Boon Seng saw an animal for the first time in the zoo. He concluded that it was a bird. Which of the following characteristics should this animal have in order to be classified as a bird ?

(A) It has feathers on its body
(B) It has a beak
(C) It can fly

(1) A,B and C
(2) A and B only
(3) B and C only
(4) A only

Hi
The answer is 2.The special characteristics of a bird is that each bird has
is:
1.Has feathers
2.have a pair of wings and a pair of legs
3.Have a beak
Charsen

[ximinful]

Will a person have gravitational potential energy if he/she stands on the 1st level of a shopping mall with basement?

[charsen]

ximinful:

Will a person have gravitational potential energy if he/she stands on the 1st level of a shopping mall with basement?

Hi
Of course Yes.The person will have gravitational potential energy as long he is above the ground,in this case,basement is the ground floor.Since he is in the first level,he has gravitational potential energy.
Charsen

[ms_lim]

charsen:

ms_lim:

Can someone help to explain this question :


Boon Seng saw an animal for the first time in the zoo. He concluded that it was a bird. Which of the following characteristics should this animal have in order to be classified as a bird ?

(A) It has feathers on its body
(B) It has a beak
(C) It can fly

(1) A,B and C
(2) A and B only
(3) B and C only
(4) A only

Hi
The answer is 2.The special characteristics of a bird is that each bird has
is:
1.Has feathers
2.have a pair of wings and a pair of legs
3.Have a beak
Charsen

Thanks. I checked the internet and its says octopus and squid also have beak. So is beak unique to bird?