To explain a process, attach a reason to every important step. A list tells the marker what you know; a linked explanation shows that you understand why.
This lesson is part of the SPM subjects and learning resources section. It covers the writing skill. Hands-on practical work is arranged by your school.
How do I turn steps into an explanation?
Take each step and finish the sentence “…because…” or “…so that…”. If you cannot finish it, you have found a gap in your understanding, which is useful to know before the exam.
Worked example: storing raw chicken
Take this question: “Explain how raw chicken should be stored in a home refrigerator.”
Weak answer (a list).
- Wrap the chicken.
- Put it on the bottom shelf.
- Keep the fridge cold.
- Cook it within a few days.
Every step is sensible, but nothing shows why.
Strong answer (steps with reasons).
The chicken should be wrapped or placed in a covered container, so its juices cannot leak onto other food. It should be stored on the bottom shelf, because any drips then fall away from ready-to-eat food and cannot carry bacteria onto it. The fridge should stay cold, which means bacteria multiply more slowly. The chicken should be cooked within the time on its label, therefore it is used before bacteria have had long enough to build up.
Each step now has a cause and an effect, and that is what an explain question rewards.
The mistake that costs marks
The common slip is to write a neat list and assume it counts as an explanation. The second slip is a reason that only repeats the step, such as “keep it cold because it must be cold”.
| Step | Weak reason | Strong reason |
|---|---|---|
| Wrap the chicken | “To keep it wrapped” | So juices cannot leak onto other food |
| Bottom shelf | “It is the rule” | Drips fall away from ready-to-eat food |
| Keep the fridge cold | “It must be cold” | Bacteria multiply more slowly in the cold |
A quick test for your own answers
Read each sentence and ask “so what?”. If the sentence does not answer it, add a reason. This works in every Home Science process question, from food preparation to caring for fabric.
Check yourself
Explain why leftover cooked rice should be cooled quickly and kept in the refrigerator rather than left on the table.
Answer
Cooked rice can carry bacterial spores that survive cooking. If the rice sits at room temperature, the spores become active and the bacteria multiply.
Model answer: “Leftover rice should be cooled quickly and refrigerated, because bacteria that survive cooking multiply easily at room temperature. The cold slows their growth, so the rice stays safe to eat for longer. Leaving it on the table gives them time to build up, which means the rice could cause food poisoning.”
What to study next
Next, practise choosing a household option with a fact behind it in justify a household resource decision with evidence. Then test both skills in the Home Science original practice set.
Paste your answers into the structured answer self-review to see whether each step has a reason. A teacher can also do this with you in online one-to-one Home Science tuition.