What teachers look for in the first two SBA skills (30 marks each): using apparatus correctly, taking accurate readings, recording observations, and writing a clear lab report.
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.
Two of the four SBA skills are about what you do at the bench and how you write it down. Both can be practised every single lesson.
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.
30 marks: using apparatus correctly and taking accurate readings.
30 marks: recording observations and reporting.
Read to 0.05 cm³ at the bottom of the meniscus at eye level.
Zero it; record to 0.01 g.
Quantity / unit in each heading; same decimals.
Exact colour and state; never “nothing happened” alone.
Aim, diagram, method (past tense), results, inferences, conclusion.
Single line through errors; do not use correction fluid.
3 quick games on this lesson. Earn XP and badges as you play — your best score for each game is saved. Games are for practice and do not change your exam readiness. More games in the Chemistry Arcade.
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 (11 marks in total). Show all your working — method marks count. Your answers are saved on this device.
Question 1 [11 marks]
A student carries out a titration and records the results.
(a) (a) State three techniques for reading a burette accurately. [3]
(b) (b) State two features of a well-designed table of results. [2]
(c) (c) State what should be written for the observation “the solution changed colour”. [2]
(d) (d) Distinguish between an observation and an inference. [2]
(e) (e) State two ways to improve the accuracy of titration readings. [2]
Everything in this lesson is based on these parts of the CXC syllabus and papers.