Turning an observation into a testable hypothesis, variables and controls, writing a proposal, and how the investigation project is marked.
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.
“Farmers notice the grass is greener where animals were tied.” Can you turn that into an experiment? That’s Planning and Designing.
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.
Clear, testable statement linking manipulated and responding variables (2 marks).
Must match the hypothesis.
Manipulated (changed), responding (measured), controlled (kept constant).
Identical set-up without the factor, for comparison.
Repeat readings / replicates; reasonable sample size; average results.
Future tense. P&D written in past tense with results is rejected.
Proposal (PD 10) + Implementation (AI 20 → 10).
The kind of support a teacher gives after the lesson: worked examples to attempt first, a board illustration, key terms, common misconceptions and memory aids.
Try it in your notebook first, then reveal the solution one step at a time.
Try it in your notebook first, then reveal the solution one step at a time.
Use these headings in order — they follow the mark scheme.
Variables: Manipulated = what I Make different; Responding = what I Record; Controlled = what I keep Constant.
Before a new fertiliser or crop variety is recommended to Caribbean farmers, researchers run planned field trials with controls and replicate plots — the same planning skills you use in P&D.
Write a hypothesis and the three types of variable for this question: “Does the type of drink (water, juice, soda) affect how fast a tooth-like eggshell softens?”
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.
6 items modelled on real CSEC Paper 1 questions. Choose one answer for each, then check. Aim for 80% or better.
Write full answers, then reveal the mark scheme and tick the points you earned (11 marks in total). Your answers are saved on this device.
Question 1 [11 marks]
A farmer notices the grass is greener where animals have been tied for grazing.
(a) Write a hypothesis and an aim. [3]
(b) Outline a method, naming the manipulated, responding and controlled variables and the control. [6]
(c) State the expected results and ONE limitation. [2]
Everything in this lesson is based on these parts of the CXC syllabus and papers.