How to earn the 30 Experimental Skills marks and 10 Use of Knowledge marks in Paper 032: hypotheses, variables, methods, tables, graphs, calculations, sources of error and conclusions.
5 narrated scenes. Press play, listen and read along — the points appear as they are explained. Use ‹ Prev / Next › or the scene bar to jump to any scene.
Paper 032 rewards a clear routine. Learn the routine, and any practical becomes a set of marks you already know how to earn.
Narration uses your device’s built-in voice. No sound? Switch to “Captions only” — the captions advance on their own.
Copy these into your notebook in your own words — that is how they stick.
2 h 10 min; three questions; 40 marks; Experimental Skills 30, Use of Knowledge 10.
Testable statement linking two variables.
Manipulated, responding (how measured), controlled (at least two).
Numbered steps, quantities, labelled diagram, repeats, safety.
Quantity and unit in each heading; consistent decimals.
Axes with units; scale; ±½ square; best-fit; large triangle.
Concordant within 0.10 cm³; mean titre.
Specific errors and specific improvements.
8 items modelled on real CSEC Paper 1 questions. Choose one answer for each, then check. Aim for 80% or better. Work each item on paper first.
Write full answers, then reveal the mark scheme and tick the points you earned (20 marks in total). Show all your working — method marks count. Your answers are saved on this device.
Question 1 [20 marks]
A student wants to investigate how the concentration of hydrochloric acid affects the rate at which marble chips (calcium carbonate) lose mass.
(a) (a) Write a hypothesis for the investigation. [2]
(b) (b) State the aim. [1]
(c) (c) Identify the manipulated variable, the responding variable and how it is measured, and two controlled variables. [3]
(d) (d) List the apparatus and materials. [2]
(e) (e) Describe the method with a labelled diagram. [5]
(f) (f) Draw a table suitable for recording the results. [2]
(g) (g) State the expected result and one limitation of the method. [3]
(h) (h) State the type of reaction and write the equation. [2]
Everything in this lesson is based on these parts of the CXC syllabus and papers.