Q&A - P3 Science

[elkniwt]

Hi,


I am new to this site. Hope I post it correctly. (forgive my blurness)

Can I ask a qn? (P3 science) ... Is a schoolbag a system?? What about a book?? (My dd just asked me this afternoon. ) Thanks for any help.

[tony]

Hi AnnT2009,


Sorry for the late reply. Like your daughter, I had a double take on (d) - They are found everywhere.

My thinking was/is - fungi need to feed on rotting matter. Not all fungi need reduced sunlight/darkness to survive, but they do need rotting matter to grow on. Since rotting matter is not everywhere, fungi can't be everywhere. For example within the walls of a vacuum flask, there is nothing. In fact, I relied on the absolute nature of the wording to arrive at the conclusion.

Atutor2001, I thought \"everywhere\" means literally everywhere, like every single place? Merriam-Webster's Online Dictionary has \"Everywhere\" defined as \" in every place or part\", and \"Every\" is defined as \"being each individual or part of a group without exception\".

AnnT2009, there's definitely enough doubt to query the teacher. The question is poorly worded for sure. After thinking of vacuums on earth, surely there can't be dead matter and therefore fungi everywhere. Let us know what the teacher says!

[tianzhu]

Hi


In P3 Science, students learn that mushrooms, moulds and yeast are classified as fungi. So if we include mould, it’s not wrong to say that fungi are found everywhere.

You may find out more about fungi by following these links.
http://www.edu.pe.ca/southernkings/microfungi.htm
http://www.naturegrid.org.uk/biodiversity/crypfungi.html
http://www.osha.gov/SLTC/molds/

Of course, it’ll be interesting to find out more about the answer from your child’ teacher.

Best Wishes

[atutor2001]

tony:

Hi AnnT2009,


Atutor2001, I thought \"everywhere\" means literally everywhere, like every single place? Merriam-Webster's Online Dictionary has \"Everywhere\" defined as \" in every place or part\", and \"Every\" is defined as \"being each individual or part of a group without exception\".

\"Everywhere\" can have a few uses. For example, \"Trees are found everywhere in Singapore.\" would mean that trees can be found in alot of places but not every single place. Similarly, \"There was blood everywhere at the crime scene\" cannot imply that every inch of the place is covered by blood.

Maybe you can try checking with \"Collin Cobuild\". I like this dictionary because it gives the most comprehensive examples on different uses for each word.

[Lynn2]

Hello All


I have a science question from the following link, question 5
http://www.wendykoh.com/06/primary4-rgs-science.pdf

May I know what is the relationship between the number of sumberged plant and the amount of soil being washed into the pond.

Can someone explain to me what they are looking for when talking about soil being washed into the soil?

thanks

rgds
Lynn2

[tianzhu]

Hi


Under the old science syllabus, a little bit of water pollution is covered under the topic on Water in P4.I am not sure about the current syllabus.

Concept
When soil is washed into the pond, water becomes muddy or cloudy. It blocks sunlight from reaching the submerged water plants; therefore they cannot carry out photosynthesis to make food. They may wilt and eventually die, leading to decrease in the number of submerged water plants.

Use the concept
Figure 1 shows that the number of submerged water plants decreases as the amount of soil washed into the pond increases. Therefore it is correct.

In figure 2, the number of submerged water plants is not affected by the amount of soil washed into the pond. Hence it is incorrect.

Figure 3 is offside. It shows that the number of submerged water plants increases as the amount of soil washed into the pond increases.

Figure 4, at any number of submerged water plants, the amount of soil washed remained constant. Hence, it’s wrong.

Option(1) is the correct answer. Hope this helps.

[tianzhu]

Hi, Dharma and Full.Cream


There are some missing information in one of my previous post.Here is the revision.Please follow this link.

http://www.oldschool.com.sg/index.php/module/PublicAccess/action/Wrapper/sid/a1d5550a35132f7d768a9cd73d70318e/mcq_id/15658

I am sorry for the inconvenience.

[acforfamily]

Hi, appreciate your help on this question from Henry park p3 SA2 paper


Characteristics of a plant x
- it bears fruit
- it grows on land
- it does not have branches

Which statement / (s) is correct?

a) it is a palm
b) it is a fern
c) it is a flowering plant

Is it (a) and or
only ?
(b) is incorrect as ferns do not bear fruit
is correct as flowering plants bear fruit

[watmekiasu]

acforfamily:

Hi, appreciate your help on this question from Henry park p3 SA2 paper


Characteristics of a plant x
- it bears fruit
- it grows on land
- it does not have branches

Which statement / (s) is correct?

a) it is a palm
b) it is a fern
c) it is a flowering plant

Is it (a) and (c) or
only (c)?
(b) is incorrect as ferns do not bear fruit
(c) is correct as flowering plants bear fruit

I recall dd doing this question some time ago. In the assesment book , it mentioned that palm trees do not have branches (tho I still find it hard to believe).

[Lynn2]

Hello Tianzhu

Thanks for your crystal clear concept and explanation.

For the same paper,that is rgs06 paper. I have one more question, and that is question 8.

Function of stomata is for the exchange of gases.But why is the answer is to prevent too much water from being lost to its surroundings.May I know how this gases thingy linked to sunlight.

Thanks again

rgds

tianzhu:

Hi

Under the old science syllabus, a little bit of water pollution is covered under the topic on Water in P4.I am not sure about the current syllabus.

Concept
When soil is washed into the pond, water becomes muddy or cloudy. It blocks sunlight from reaching the submerged water plants; therefore they cannot carry out photosynthesis to make food. They may wilt and eventually die, leading to decrease in the number of submerged water plants.

Use the concept
Figure 1 shows that the number of submerged water plants decreases as the amount of soil washed into the pond increases. Therefore it is correct.

In figure 2, the number of submerged water plants is not affected by the amount of soil washed into the pond. Hence it is incorrect.

Figure 3 is offside. It shows that the number of submerged water plants increases as the amount of soil washed into the pond increases.

Figure 4, at any number of submerged water plants, the amount of soil washed remained constant. Hence, it’s wrong.

Option(1) is the correct answer. Hope this helps.