Pei Hwa Presbyterian Primary

[S6169]

freezeat2:

My child got the question on bird and plant wrong as he was thinking along the line of how dispersal and pollination help to continue the plant kind. I wonder if continuation of plant kind can be considered as one way of helping in the survival of plant S. I see that as a more general way of survival, just like survival of mankind.

My son also give the same answer and was marked wrong. The teacher said must write this word \"survival\" in the answer. :?
I look through my son's Science paper, he got minus one or half marks every where. Hardly got any question obtained full marks.

[Jennifer]

S6169:

freezeat2:

My child got the question on bird and plant wrong as he was thinking along the line of how dispersal and pollination help to continue the plant kind. I wonder if continuation of plant kind can be considered as one way of helping in the survival of plant S. I see that as a more general way of survival, just like survival of mankind.

My son also give the same answer and was marked wrong. The teacher said must write this word \"survival\" in the answer. :?
I look through my son's Science paper, he got minus one or half marks every where. Hardly got any question obtained full marks.

The so-called correct answer for the Bird R n Plant S my boy wrote down was \"Plant S produces oxygen for Bird R to survive\". To me, this is ridiculous. I can agree \"Plants produce oxygen for animals to survive\". But I cant accept \"Plant S produces oxygen for Bird R to survive\" = Bird R will die if it takes in oxygen not produced by Plant S or Bird R must carry Plant S on its back like a oxygen tank???

The qn setter wants to relate concepts to real life- I am fine with this. BUT set a better qn lah.

[Jennifer]

S6169:

There is a question about the similarity of toy car and the panda. My son said both of them can move, but the answer is both of them have mass. If this been tested in lower Primary, my son’s answer should be correct?

The qn was \"similarity n difference in the characteristics ...\". The key word is \"CHARACTERISTICS\".

Hence both can move is wrong. Living things can move on their own, non-living things cannot move on their own.

[Jennifer]

janet_lee88:

Jennifer:

2. Conveyor belt use of strong magnet) should not be tagged at P5 level.

sorry to jump in...but this question appears often.
my son was tested on the advantages/disadvantages of using electromagnet in maglev train.

This qn was accompanied by a diagram.

\"my son was tested on the advantages/disadvantages of using electromagnet in maglev train\"
was there a diagram provided?

[S6169]

[quote="Jennifer"]Parents of P5 pupils, how do you feel about the Science section B paper?

Explain the closed circuit for the door bell to work [quote]

I think 2nd part of this this Q is wrong. when the switch is off, the spring metal (the conductor of electricity) still in contact, so the circuit is still a close circuit and everything is functioning.(electric induced magnetic force is still there).
What is the Model answer for the 1st part of the Q? From my boy, I think the answer also inaccurate.

[janet88]

Jennifer:

janet_lee88:

[quote=\"Jennifer\"]2. Conveyor belt use of strong magnet) should not be tagged at P5 level.

sorry to jump in...but this question appears often.
my son was tested on the advantages/disadvantages of using electromagnet in maglev train.

This qn was accompanied by a diagram.

\"my son was tested on the advantages/disadvantages of using electromagnet in maglev train\"
was there a diagram provided?[/quote]There was a diagram for that question.

[Jennifer]

abc123mama:

P5 science section B: my boy did an average job. Previously, he always lost marks because of incomplete description. This time, he had abnormal and creative thinking to the questions. For example, cage for pet mouse. He thinks if he uses glass, the mouse will be overheated.

I do not think your boy is wrong to think the hamster will die from heat.

The qn is too vague - a 1 dimensional diagram of a house with no windows or labels it is a open top whatsoever.

I wrote a note : neither material is suitable. The hamster will either die of lack of oxygen or heatstroke.

[Jennifer]

janet_lee88:

Jennifer:

This qn was accompanied by a diagram.


\"my son was tested on the advantages/disadvantages of using electromagnet in maglev train\"
was there a diagram provided?

There was a diagram for that question.

By chance, do you need have the qn to upload here? It will be very useful for us to understand what type of real-life qns will be used in exams

[dyh]

Jennifer:

abc123mama:

P5 science section B: my boy did an average job. Previously, he always lost marks because of incomplete description. This time, he had abnormal and creative thinking to the questions. For example, cage for pet mouse. He thinks if he uses glass, the mouse will be overheated.

I do not think your boy is wrong to think the hamster will die from heat.

The qn is too vague - a 1 dimensional diagram of a house with no windows or labels it is a open top whatsoever.

I wrote a note : neither material is suitable. The hamster will either die of lack of oxygen or heatstroke.

my son thought it is to do with heat too. but the paper stated \"temperature is constant\". so cannot argue with them.

[Jennifer]

S6169:

I think 2nd part of this this Q is wrong. when the switch is off, the spring metal (the conductor of electricity) still in contact, so the circuit is still a close circuit and everything is functioning.(electric induced magnetic force is still there).

What is the Model answer for the 1st part of the Q? From my boy, I think the answer also inaccurate.

a) The doorbell rang when the switch was closed, the circuit became closed. The iron core became an electromagnet which attracts the armature.

b) Even though the switch was turned off, the iron core remains a temporary magnet for a while, attracting the metal armature and closed the contact, thus making the circuit closed.