Lower Secondary Science

[Koky462]

My DS still has another question on lens.


When light which is perpendicular to the principal axis passes through a converging lens, what happens to its path?

I would appreciate if anyone can enlighten me again.

[KS-Lim]

Hi everyone


Pls advise / recommend any good guide book for Sec 1 Science.

Thanks

[mum_sugoku]

Koky462:

My DS still has another question on lens.


When light which is perpendicular to the principal axis passes through a converging lens, what happens to its path?

I would appreciate if anyone can enlighten me again.

It will undergo refraction, ie light ray will bend towards the normal..

[Koky462]

My DS has another question on electrochemistry.


Why must the electrolyte be Copper(II)Sulphate solution for the purification of copper? Can’t it be other molten or aqueous ionic compounds?

Thank you.

[mum_sugoku]

Koky462:

My DS has another question on electrochemistry.


Why must the electrolyte be Copper(II)Sulphate solution for the purification of copper? Can't it be other molten or aqueous ionic compounds?

Thank you.

Becos it's the Cu2+ ions from CuSO4 solution that get deposited on the cathode. (Meanwhile Cu at anode \"melts\" into the solution so concentration of solution remains constant)

[Koky462]

Thanks alot, mum_sugoku! I appreciate your help!

[barbie kelly ng]

I am desparately looking for a secondary 1 science tutor and anyone has recommendations. We are staying in Serangoon Central. Thank you very much.

[meimeitan]

Hi Parents and Students


Do u hv the answers for the textbook of ‘Chemistry Matters for GCE O Level’ - third edition?

Thanks.

[cheese]

meimeitan:

Hi Parents and Students


Do u hv the answers for the textbook of 'Chemistry Matters for GCE O Level' - third edition?

Thanks.

Same here. looking for the answers for the text book of \"Chemistry Matters for GCE O Level.
Dun noe any website can provide or can we buy the answer booklet?
Appreciate advice & help.

[Interested]

Hi,


Need help to advise on what are the suitable science assessment or reference book for physic, chemistry and biology for ds in sec 1 ? Is there a different on the type of reference or assessment books that I have to get for ip school. TIA