Q&A - P3 Science

[Tang]

nani:

Here is a question found in a p3 science bk:

Question: What is the similarity between a robot and a baby?
My son's ans:Both have systems.
Teacher's ans: Both have hands and legs.
Which is a better ans? Pls help,thnx!

Both can move.

Both can respond to changes.

Answer in terms of living things and non-living things.

Based on above, the teacher's answer \"Both have hands and legs.\" is better - related to \"move\" and \"respond to changes\".

\"Systems\" is not so appropriate as this Topic is taught so much later than the Topic \"Living and Non-Living Things\". I believe for this question, a picture of the robot and the baby is given. We also cannot see any \"Systems\" based on the picture given.

[Joy]

Hello all


Can I just post one mcq before my girl exam which is tomolo?

Su placed a bag of ice cubes weighting 58g on an electronic scales.what will the reading on the scale be when all the ice cubes in the bag has melted.
1exactly 58g
2slightly less than 58g
3 slightly more than 58g
4 not possible to tell/.

ans given is 3

can someone explain.thanks

[elkniwt]

Hi,


Like to check with regards to Nan Hua 2008 SA2 Science Q8

Which one of the following group of animals has the function of the outer coverings matched to it wrongly?

Animal/Outer Body Covering/ Function
1) Bird / colour feathers / camouflage with the surrounding
2) Insect/ hard outer covering/ protects its body
3) fish/scales / propel it in swimming
4) mammal/fur/keep its body warm

The ans given in the ans key is 2. My dd's ans is 3 and I kinda feel that 3 is more correct. Anyone there can shed light on this question? Thanks and really appreciate. :lol:

[atutor2001]

Joy:

Hello all


Can I just post one mcq before my girl exam which is tomolo?

Su placed a bag of ice cubes weighting 58g on an electronic scales.what will the reading on the scale be when all the ice cubes in the bag has melted.
1exactly 58g
2slightly less than 58g
3 slightly more than 58g
4 not possible to tell/.

ans given is 3

can someone explain.thanks

Hi Joy

The answer is 3 because water vapour from the surrounding air will condense on the external surface of the bag. This additional water will increase the weight indicated on the weighing scale. :lol:

[atutor2001]

elkniwt:

Hi,


Like to check with regards to Nan Hua 2008 SA2 Science Q8

Which one of the following group of animals has the function of the outer coverings matched to it wrongly?

Animal/Outer Body Covering/ Function
1) Bird / colour feathers / camouflage with the surrounding
2) Insect/ hard outer covering/ protects its body
3) fish/scales / propel it in swimming
4) mammal/fur/keep its body warm

The ans given in the ans key is 2. My dd's ans is 3 and I kinda feel that 3 is more correct. Anyone there can shed light on this question? Thanks and really appreciate. :lol:

Hi elkniwt

I share the same answer as your daughter. I think there is printing error in the answer key.

[MdmKS]

Muffins:

MdmKS:

Got this problem from my P3 child worksheet.


A conical flask contain some water and a plant with its roots submerged in the water. A stopper is fixed at the mouth of the flask holding the stem of the plant with its leaves hanging outside the conical flask. Sorry, I am not sure how to upload the image file here.
Question : how to reduce the rate of water being absorbed by the roots? Give 2 methods, without changing the setting of the experiments.

T!A

Hi MdmKS, I think you could reduce the amount of water in the set-up, and chop off the roots. This changes the plant, but not the setting of the experiment. Settings of an experiment mean that the plant should not be moved to a different location...

Hi all, thanks for making this problem \"stay alive\" . Tomorrow is son's Sci exam and till now the teacher still have no chance to go thru the answer with them yet due to the long break follow by exam. The paper has been guided self-marked and done half way.

[Joy]

hello


thanks for the answer.really appreciate it.


cheers

atutor2001:

Joy:

Hello all

Can I just post one mcq before my girl exam which is tomolo?

Su placed a bag of ice cubes weighting 58g on an electronic scales.what will the reading on the scale be when all the ice cubes in the bag has melted.
1exactly 58g
2slightly less than 58g
3 slightly more than 58g
4 not possible to tell/.

ans given is 3

can someone explain.thanks

Hi Joy

The answer is 3 because water vapour from the surrounding air will condense on the external surface of the bag. This additional water will increase the weight indicated on the weighing scale. :lol:

[elkniwt]

atutor2001:

Hi elkniwt

I share the same answer as your daughter. I think there is printing error in the answer key.

Hi atutor2001,

Thanks for your help!! My dd is very happy when I tell her that. :lol:

[elkniwt]

Hi,


Another qn :

In which of these objects can magnets be found?

A piano
B stapler
C telephone
D refrigerator

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

Ans key is 3. But do you have magnet in stapler ?? :? Please advise.

[Full.010894Cream]

stapler?


I’m not even sure abt telephone…if they are referring to the ear/mouth piece, think these are piezoelectric stuff.