Tutor Niedino: Pri Science Questions and Concepts

[Niedino]

Hi all,


Thanks for the support. Model answers are subjective, and I believe that different Science teachers will have variances in the acceptance of answers. I’ll try to help answer, but please do not take my answers as the "golden standard" as I’m learning from all here.

VC’s mum, no offense, just an interesting point to note, 3rd most difficult subject to score also means 2nd easiest subject (since there are only 4 subjects). FYI, the new science syllabus will focus more on process rather than content.

About point number 2, it is generally accepted in by many teachers that there is "no" digestion in the gullet as the amount of digestion is very little and is caused by saliva produced and mixed earlier in the mouth. What you can teach your children more importantly is that there are no digestive juices produced in the gullet.

Hope it helps
Hope it helps

[watmekiasu]

:thankyou:


Looking forward to more input from you.

[Herbie]

Hi ned, can advise wat u mean by process and not content? Tx

[Faun]

Looking forward to your website. Thanks!

[snowman.022851697]

Thanks for the tips niedino ((:

[kancheongmum]

Hi Niedino


Need confirmation on the following

A metal cup and a plastic cup both contain hot water of the same temperature. After 15 mins the water in which cup will have a higher temperature. Answer: water in the plastic cup Reason: metal is a better conductor of heat than plastic, so heat is conducted away faster.

What if the water is changed into cold water?
After 15 mins the water in which cup will have a lower temperature.
Answer: water in the plastic cup. Reason: metal is a better conductor of heat so it gain heat faster from the surrounding.

Thank you

[rkumar]

Correct on both accounts.

[rkumar]

Oops sorry, didn’t realise it was a private thread. please disregard previous post.

[singapore45]

kancheongmum:

Hi Niedino


Need confirmation on the following

A metal cup and a plastic cup both contain hot water of the same temperature. After 15 mins the water in which cup will have a higher temperature. Answer: water in the plastic cup Reason: metal is a better conductor of heat than plastic, so heat is conducted away faster.

What if the water is changed into cold water?
After 15 mins the water in which cup will have a lower temperature.
Answer: water in the plastic cup. Reason: metal is a better conductor of heat so it gain heat faster from the surrounding.

Thank you

Hi Niedino,

Could you provide the answer for this as I am a little confused about it as well. What should the proper phrasing be?

[rkumar]

kancheongmum:

Hi Niedino


Need confirmation on the following

A metal cup and a plastic cup both contain hot water of the same temperature. After 15 mins the water in which cup will have a higher temperature. Answer: water in the plastic cup Reason: metal is a better conductor of heat than plastic, so heat is conducted away faster.

What if the water is changed into cold water?
After 15 mins the water in which cup will have a lower temperature.
Answer: water in the plastic cup. Reason: metal is a better conductor of heat so it gain heat faster from the surrounding.

Thank you

Hi Niedino

Correct me if i am wrong but i think the reason for Q1 \"metal is a better conductor of heat than plastic, so heat is conducted away faster.\"
should be Metal is a poor insulator of heat so heat is lost to the surrounding faster