Q&A - P3 Science

[Champion]

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Hi,
Need advice for another question

Question (4) in the above attachment:- is \"Glass is hard\" an acceptable answer?
The answer sheet given, \"Glass does not interact with many chemicals\".

:thankyou:

[Champion]

WCW:

champ, very small cant see lei...

Hi, sista, edited to make it bigger liow!

[smartmummy]

Champion:

http://i55.tinypic.com/n6vy10.jpg\">

Hi,
Need advice for another question

Question (4) in the above attachment:- is \"Glass is hard\" an acceptable answer?
The answer sheet given, \"Glass does not interact with many chemicals\".

:thankyou:

Champ!
I think Glass is hard is not acceptable cos that property is not useful here.Should be the material cannot be interact with many chemicals as they are using in labs.
I googled and find answer as follows,

beakers and flasks are used as they are much more efficient in laboratories, they are easy to fine, cheap, do not melt and dont react with anything.

Read more: http://wiki.answers.com/Q/Why_are_beakers_and_flasks_used_in_laboratories_made_of_thin_glass#ixzz1VS5H9ibE

[smartmummy]

Hi All!

I have a doubt.
Is ceramics are man-made?
ceramics are made from clay. clay is natural.So how can we say ceramics are man-made.
Please help me.Thank you.

[smartmummy]

i have a qn.

Is it correct to say that the stress ball can be compressed?Explain ur answer.

pls help.thank you.

[Champion]

smartmummy:

Hi All!

I have a doubt.
Is ceramics are man-made?
ceramics are made from clay. clay is natural.So how can we say ceramics are man-made.
Please help me.Thank you.

smartmummy,

\"Clay is a naturally occurring substance. Shaping it and firing it to make the shape permanent is a human activity.\" So, if it involves the \"human-activity\" then it will be man-made than coming natural from the ground.

This my 2 cents worth of analysis; for reference and discussion purpose

[jedamum]

smartmummy:

Hi All!

I have a doubt.
Is ceramics are man-made?
ceramics are made from clay. clay is natural.So how can we say ceramics are man-made.
Please help me.Thank you.

my assessment book say ceramics are natural-occurring materials.

[jedamum]

Champion:

smartmummy:

Hi All!

I have a doubt.
Is ceramics are man-made?
ceramics are made from clay. clay is natural.So how can we say ceramics are man-made.
Please help me.Thank you.

smartmummy,

\"Clay is a naturally occurring substance. Shaping it and firing it to make the shape permanent is a human activity.\" So, if it involves the \"human-activity\" then it will be man-made than coming natural from the ground.

This my 2 cents worth of analysis; for reference and discussion purpose

champion,
if involve human activity, then there is hardly any natural material already ah.
my definition of man-made is like plastic, where the raw materials are not natural. but for cloths and paper and glass, the raw materials are natural, hence they are natural-occurring material.

smartmummy, any specific questions you encounter?

[smartmummy]

@ jedamum

yah I have one qn in Frequency Asked Questions - Janet Sim

champ! pls help me to post the qn if possible.Thanks
chapter2—q3 page number44

Ceramic and Plastic are grouped under Man-made
Rubber and sand are grouped under Ground
Silk and Cotton are grouped under Plants
Qn. Which of the materials is/are incorrectly classified?
Answer : Rubber and silk only

[Champion]

jedamum:

my assessment book say ceramics are natural-occurring materials.

Hi jedamum,
Can advise me which assessment book you using? Might be in time to get another one to \"add on to my collection\"!