You are supposed to plan the whole experiment until conclusion

Anyway, there should be a guide at the question like "your report should include ......"

The marks aren't fixed . Sometimes it's eight , sometimes ten , sometimes twelve . You don't need hypothesis or variables or anything like that , planning of experiment is the one in paper three .

In paper two , you'll need to describe an experiment using passive voice .

You need :

1 . Apparatus and Materials ( sometimes they want chemicals only but I always give apparatus just to be safe ) .
2 . Procedure ( this carries most marks , sometimes up to eight marks (
3 . Observation / Chemical equation / Table / Graph ( depending on the question , normally Salts questions require chemical equations , and electrolysis experiments require observations at the anode or cathode ) .

That's all . If you can fulfil these criteria , you don't need to worry about the marks .

SPM Chemistry past year book has HORRIBLE answers . Look at trial paper mark schemes instead .

What's the question again ? My past year Chemistry book is with someone else . I'll reply to you tomorrow as I'm about to go offline -- Packing my school stuff . My study table is a mess .

I pump up most of my form 4 stuff this holiday. Read those necessary chapters, which you may not familiar with. Such as che: salt, electrolysis phy: motion,light bio: basically everything.  If got time, then study those others chapter. PS: I still got add math and sej need to study. Sej is my weakest subject

Because all the circuit current must pass through there.
Btw, another addmath question again question 2

Please attach working and explaination please.

Any ideas how to do this? 

Yea! Can you explain please?

The same way you showed mooney.

But DO NOT forget that the angle in Pythagorean trigonometric identity can be positive or negative (±√). Because θ in this case is an obtuse angle, so you need to apply the minus sign (−√).

sin² θ + cos² θ = 1

The reference angle that you refer is usually an acute angle or ∠0° < α < ∠90°. Probably you are not familiar when the angle is an obtuse angle, ∠90° < θ < ∠180°. Nevertheless, you can express sin (180° + θ) in terms of the acute angle α, and then convert it to back to obtuse angle θ.

If you are driving and you see there is a toll in front and you know you will be slowed down will you still take that route?

Electric always use the less resistance route.

Hmmm, the difference between S1S2 and S2 only is there is a resistor added when only S2 is closed

Just realize this point, need someone else to help out