Q&A - PSLE Science

[anneshirleygilbert]

tianzhu:

anneshirleygilbert:

Answer given in Answer Key : A
My query: Couldn’t Option D be also correct?

Hi

I think classification is covered under Diversity of living and non-living things in P3.

If I remember correctly, the penguin is given as one of the examples of flightless bird.

So naturally, many primary students would go for option (1) ------- A
Maybe, this is the expected response in the answer sheet.

But you’re correct to say that option (4) is also an appropriate answer. There are birds which can swim and fly.

Best wishes

Thank you, Tianzhu. Hope no such question appear in the PSLE. Bless all the dear little brains... they almost have to mind-read the examiner.

[tianzhu]

tisha:

Which of the following statements are true?
A. Chlorophyll is only found in the leaves.
B. Leaves capture chlorophyll to make food.
C. Oxygen is not needed in the process of photosynthesis
D. Gaseous exchange can only take place through the stomata.

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

Hi tisha

Good Morning.

A and B are offside.

C is true; oxygen is a product of photosynthesis.

D may not be completely true, but in primary science, students learned that plant respire through openings called stomata.It would be better if only had been left out in the option.

Therefore, given the four choices, I‘d go for option (4) ------ C and D only. That’s the closest answer.

Best wishes

[tianzhu]

anneshirleygilbert:

Thank you, Tianzhu. Hope no such question appear in the PSLE. Bless all the dear little brains... they almost have to mind-read the examiner.

Hi anneshirleygilbert

Good Morning.

PSLE is a national exam, in the development of the questions, I am sure that there will be multiple checks by different teams of experienced teachers.

So even though, students may have different learning resources, arrive in different modes of transport to take the exam, but at the end of the day, every student takes the same paper.

Don’t worry too much.

Best wishes

[tisha]

tianzhu:

tisha:

Which of the following statements are true?
A. Chlorophyll is only found in the leaves.
B. Leaves capture chlorophyll to make food.
C. Oxygen is not needed in the process of photosynthesis
D. Gaseous exchange can only take place through the stomata.

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

Hi tisha

Good Morning.

A and B are offside.

C is true; oxygen is a product of photosynthesis.

D may not be completely true, but in primary science, students learned that plant respire through openings called stomata.It would be better if only had been left out in the option.

Therefore, given the four choices, I‘d go for option (4) ------ C and D only. That’s the closest answer.

Best wishes

A very good morning to you tianzhu. Thanks a lot for the answer. I still have one doubt though, why did you rule out option A. :?

[ParentingChildren]

Hi Tisha,


Depending on the plant, chlorophyll can also be found in parts other than the leaves. For example, some cacti have their chlorophyll in their stems.

[tisha]

ParentingChildren:

Hi Tisha,


Depending on the plant, chlorophyll can also be found in parts other than the leaves. For example, some cacti have their chlorophyll in their stems.

Thank you. Now it is clear.

[tianzhu]

tisha:

A very good morning to you tianzhu. Thanks a lot for the answer. I still have one doubt though, why did you rule out option A. :?

Hi

Option like A, Chlorophyll is only found in the leaves usually appears in exams to confuse students.

If you do a search on Google, you’ll realise that chlorophyll can be found on the stems of plants as well as some algae. A good example has been given by ParentingChildren.

Options involving “absolute words” such as “only”, “always” or “never” are less likely to be correct.

Best wishes.

[chrisu]

Understand that the 2011 PSLE Science followed the 2008 Science syllabus; would like to know is the Phases of the Moon (especially calculating the dates of the phases of the moon) still in this year PSLE syllabus? Saw some science questions in \"Road to PSLE\" on Phases of the Moon in 2008.


Thank you.

[tianzhu]

chrisu:

Understand that the 2011 PSLE Science followed the 2008 Science syllabus; would like to know is the Phases of the Moon (especially calculating the dates of the phases of the moon) still in this year PSLE syllabus? Saw some science questions in \"Road to PSLE\" on Phases of the Moon in 2008.


Thank you.

Hi

The topic on Day and Night cycles is not in the new syllabus.

You may wish to confirm it with your kid's teacher.

Best wishes

http://www.moe.gov.sg/education/syllabuses/sciences/files/science-primary-2008.pdf

http://www.punggolpri.moe.edu.sg/cos/o.x?c=/wbn/pagetree&func=view&rid=15664

[Belle2011]

Amy wants to find out whether plants with red leaves could make food. She plucked a red leaf from a potted plant and carried out an experiment.

The steps given below are NOT in order:
A) Soak the leaf in a boiling tube of warm alcohol.
B) Put a few drops of iodine on the leaf.
C) Wash the leaves in a beaker of water.
D) Put the leaf in boiling water for 20 seconds.

(a) What are the correct order to carry out the experiment?
(b) Why was the leaf soaked in warm alcohol?
Why was the leaf put in boiling water for 20 seconds?

Thank-you.

Cheers,
Belle.