Q&A - PSLE Science

[Nebbermind]

I wld avoid answers which have ‘each type’ as even the same type may have different soil composition.


I’ll go for (3)

[WS1234567]

The timing is not important in such answers.

[WS1234567]

Nebbermind:

I wld avoid answers which have 'each type' as even the same type may have different soil composition.


I'll go for (3)

When the question mentions three different types, it is perfectly ok to use 'each type'.

[atutor2001]

WS1234567:

The timing is not important in such answers.

However, the question is very specific : \"What is the aim of the experiment?\" the answer given must be \"sure correct one\" (based on the facts given). How are we to know for sure that the person is interested in finding out how well the soil will absorb water?

[WS1234567]

atutor2001:

WS1234567:

The timing is not important in such answers.

However, the question is very specific : \"What is the aim of the experiment?\" the answer given must be \"sure correct one\" (based on the facts given). How are we to know for sure that the person is interested in finding out how well the soil will absorb water?

To know the aim of the experiment, we actually need to know what the person is measuring at the end of the experiment.

The soil that is better able to absorb water will not allow all the water to be flow out of it so quickly, thus giving a timing that is slower.

[atutor2001]

WS1234567:

atutor2001:

[quote=\"WS1234567\"]The timing is not important in such answers.

However, the question is very specific : \"What is the aim of the experiment?\" the answer given must be \"sure correct one\" (based on the facts given). How are we to know for sure that the person is interested in finding out how well the soil will absorb water?

To know the aim of the experiment, we actually need to know what the person is measuring at the end of the experiment.

The soil that is better able to absorb water will not allow all the water to be flow out of it so quickly, thus giving a timing that is slower.[/quote]Thank you

[leesf]

Hi, will appreciate help on the following 2 questions. Thanks


Q1) Which of the following is wrongly stated?
A) Both plants and animals can move
B) Both plants and fungi cannot move
C) All plants, animals and fungi release carbon dioxide
D) Both fungi and animals depend on other living for nutrition.

1) A
2) B
3) C
4) D

Ans : 2

Reason being although plants cannot move from one place to another, they can respond by growing towards light.

I just like to confirm the above answer and explanation is correct as we always have the concept that plants cannot move.


Q2) Four painted tins were placed under the sun. A thermometer was inserted into each tin. After 30 minutes, the temperature of each tin was recorded
Tin A - painted black, Tin B - painted silver, Tin C - painted white, Tin D - painted brown
Which tin will have the lowest temperature reading?

Ans : Tin B

I thought answer should be white as white will reflect heat and will not be able to absorb heat as much as silver.

[youngtay]

Hi,


Can anyone explain to me for question 4,why is the answer (2)?

http://www.orlesson.org/orp/09Sc/2009-Sc-CA1-MahaBodhi.pdf


TIA

[Muffins]

Hi Youngtay, it's 2 because:


for A1, freezing does not take up heat from the surroundings, so cross that out.

For A3, Evaporation does change the state of a substance, from loiquid to gaseous, so cross that out.

For A4, Freezing does not require heating, so cross that out.

Using the simple yet effective elimination method, you can figure out that the answer is A2.

[meimeitan]

Hi! All,


May i know:

three batteries are arranged in series in a curcuit set-up and with a blub. One of the batteries is used up energy, then will be the blub still lit up?

thanks.

meimeitan