Q&A - P3 Science

[sharmila]

Vanilla Cake:

tianzhu:

[quote=\"sharmila\"]What is the difference between the 1st edition and the 2nd edition? I bought the PSLE science guide for my elder boy when he was in P3 2 years ago. Now when my younger one is going to P3 next year, its already 2nd edition.

Some topics such as The Solar System, Simple Machines, etc are not covered in the new syllabus.

Yes, Uncle tianzhu is right.
The 2nd edition is tailored and reorganised to suit the current PSLE Science syllabus ie section A on the revision notes based on different themes (Lower/Upper blocks).Section B (Process Skills) and Section C (Case studies) remain the same.

Section A (Revision Notes)
Theme: Diversity
Level: Lower Block
Chapter: Classifying Things, Living and Non-Living Things, Plants, Animals, Fungi and Bacteria, Exploring Materials.

Theme: Cycles
Level: Lower Block and Upper Block
Chapter: Life Cycles, Matter And Its Three States, From Parents To Young, Reproduction In Plants, Reproduction In Animals, Water And Changes of State

Theme: Systems
Level: Lower Block and Upper Block
Chapter: What Is A System? Your Amazing Body, The Digestive System, Plants and Their Parts, The Plant Transport System, Air And The Respiratory System, The Human Circulatory System, The Unit Of Life, Electricity

Theme: Interactions
Level: Lower Block and Upper Block
Chapter: Magnets, Forces, Living Together, Characteristics Of The Environment, Food Chains And Food Webs, Adaptations For Survival, Man's Impact On The Environment

Theme: Energy
Level: Lower Block and Upper Block
Chapter: Light, Heat And Temperature, Energy In Food, Forms, Uses And Sources Of Energy[/quote]Thank you Vanilla Cake and tianzhu

[janet88]

There were some Science guide books and assessment sold at Popular roadshows earlier...bought some of them, thinking I landed a good deal...until I realized they were old syllabus

'Diversity', 'The Solar System' are not taught in upper primary...now stuck with a pile of old books.

[sharmila]

http://www.postimage.org/


Container Y filled with marbles.
Container Z filled with water.

The above is a common diagram found in most P4 past exam papers.

Question: If the water of Container Z is poured into Container Y, some water will be able to flow in. Explain why water can flow in?

My son's ans was: There are spaces between the marbles hence water is able to flow in.

The school marked him wrong and the given answer was Water has replaced the space taken up by the air.

[janet88]

sharmila:

http://www.postimage.org/


Container Y filled with marbles.
Container Z filled with water.

The above is a common diagram found in most P4 past exam papers.

Question: If the water of Container Z is poured into Container Y, some water will be able to flow in. Explain why water can flow in?

My son's ans was: There are spaces between the marbles hence water is able to flow in.

The school marked him wrong and the given answer was Water has replaced the space taken up by the air.

The answer provided by the school is according to PSLE standard...although I do understand what your son is trying to explain...have this problem explaining to son too. School wants PSLE standard answer.

[Tang]

sharmila:

http://www.postimage.org/


Container Y filled with marbles.
Container Z filled with water.

The above is a common diagram found in most P4 past exam papers.

Question: If the water of Container Z is poured into Container Y, some water will be able to flow in. Explain why water can flow in?

My son's ans was: There are spaces between the marbles hence water is able to flow in.

The school marked him wrong and the given answer was Water has replaced the space taken up by the air.

Hi,

Here are my suggested amendments:

There are air spaces between the marbles hence water is able to flow in to take its place.


Keywords -

air between marbles,

water replaces the air or
water takes the place previously occupied by the air

[kohhweelin.010441gmail.010441com]

janet_lee88:

sharmila:

http://www.postimage.org/


Container Y filled with marbles.
Container Z filled with water.

The above is a common diagram found in most P4 past exam papers.

Question: If the water of Container Z is poured into Container Y, some water will be able to flow in. Explain why water can flow in?

My son's ans was: There are spaces between the marbles hence water is able to flow in.

The school marked him wrong and the given answer was Water has replaced the space taken up by the air.

The answer provided by the school is according to PSLE standard...although I do understand what your son is trying to explain...have this problem explaining to son too. School wants PSLE standard answer.

IMHO, it has nothing to do with PSLE standard answer. Sorry, Janet.

Sharmila, your son's answer is too vague and did not explain his understanding of the concepts learnt under properties of matter clearly.

As the question had already stated that \"some water will be able to flow in\", so the second part of your son's answer is repetitive of the question and incomplete. In this case, the concept of DISPLACEMENT of air spaces between the marbles by water should be clearly stated. If your son had added the word \"air\" before the the word \"space\" depicting that he is referring to air taking up the space bet the marbles and carried on to write \"to take its place\" depicting the displacement concept, like what Tang had suggested, he would have gotten it correct.

[janet88]

E3:

janet_lee88:

[quote=\"sharmila\"]http://www.postimage.org/


Container Y filled with marbles.
Container Z filled with water.

The above is a common diagram found in most P4 past exam papers.

Question: If the water of Container Z is poured into Container Y, some water will be able to flow in. Explain why water can flow in?

My son's ans was: There are spaces between the marbles hence water is able to flow in.

The school marked him wrong and the given answer was Water has replaced the space taken up by the air.

The answer provided by the school is according to PSLE standard...although I do understand what your son is trying to explain...have this problem explaining to son too. School wants PSLE standard answer.

IMHO, it has nothing to do with PSLE standard answer. Sorry, Janet.

Sharmila, your son's answer is too vague and did not explain his understanding of the concepts learnt under properties of matter clearly.

As the question had already stated that \"some water will be able to flow in\", so the second part of your son's answer is repetitive of the question and incomplete. In this case, the concept of DISPLACEMENT of air spaces between the marbles by water should be clearly stated. If your son had added the word \"air\" before the the word \"space\" depicting that he is referring to air taking up the space bet the marbles and carried on to write \"to take its place\" depicting the displacement concept, like what Tang had suggested, he would have gotten it correct.

:D[/quote]Got it.

[sharmila]

janet_lee88:

E3:

[quote=\"janet_lee88\"]
The answer provided by the school is according to PSLE standard...although I do understand what your son is trying to explain...have this problem explaining to son too. School wants PSLE standard answer.

IMHO, it has nothing to do with PSLE standard answer. Sorry, Janet.

Sharmila, your son's answer is too vague and did not explain his understanding of the concepts learnt under properties of matter clearly.

As the question had already stated that \"some water will be able to flow in\", so the second part of your son's answer is repetitive of the question and incomplete. In this case, the concept of DISPLACEMENT of air spaces between the marbles by water should be clearly stated. If your son had added the word \"air\" before the the word \"space\" depicting that he is referring to air taking up the space bet the marbles and carried on to write \"to take its place\" depicting the displacement concept, like what Tang had suggested, he would have gotten it correct.

Got it.[/quote]Oh ok I just understood after months of pondering. Thanks E3.

[Tang]

Tang:

sharmila:

http://www.postimage.org/


Container Y filled with marbles.
Container Z filled with water.

The above is a common diagram found in most P4 past exam papers.

Question: If the water of Container Z is poured into Container Y, some water will be able to flow in. Explain why water can flow in?

My son's ans was: There are spaces between the marbles hence water is able to flow in.

The school marked him wrong and the given answer was Water has replaced the space taken up by the air.

Hi,

Here are my suggested amendments:

There are air spaces between the marbles hence water is able to flow in to take its place.


Keywords -

air between marbles,

water replaces the air or
water takes the place previously occupied by the air

Hi,

This is my suggested answer:

The air occupies the space between the marbles. When the water flows into the space between the marbles, the air escapes.

[Happy Mama]

janet_lee88:

There were some Science guide books and assessment sold at Popular roadshows earlier...bought some of them, thinking I landed a good deal...until I realized they were old syllabus

'Diversity', 'The Solar System' are not taught in upper primary...now stuck with a pile of old books.

Hi Janet, how do you tell if they are old books and not the new syllabus? I bought quite a few science books from Popular bookstore too. :stupid: